This is a new banner I made for a little job me and my friend kind of want to do. It will end up going at the top of our webpage. Blender was used for the flames and all of the 3D stuff and I used gimp for the logo and text and stuff. First of all what do you think of the banner, problems? and secondly do you like the logo. C & C’s welcome 
It looks pretty cool but not really professional. Personally I would get rid of the drop shadow and the jaggies on the H, then make the H nothing more than a black stroke or outline. I think the most outstanding part of the design is how you left the H upright while itallicising the F. It gives it a very fast, cutting edge look. That part is very professional. Lean, mean, and out for your business. The font used for Design Corporation is way cool also, but I think it’s a bit too thick. Gives it a bit of a cartoonish look rather than a computer generated look. I think that’s suppused to be a tailpipe shooting the falmes, but it rook me a few minutes to figure that out. At first I assumed it was a gif, but then I right clicked and found out that it’s a .png. I know there’s a ballance between attractive images and file size and you crossed it on that one. The color pallet been reduced way too much with the end result being banding far beyond anything that I would consider to be acceptable. You’re better off reducing the size of the banner itself rather than the color pallet and in most cases you’re better off with a jpg or a gif. The only time that I ever use .png as a format is when I want to give an image a flat “matte finish” look as the cool cross-hatch dithering available via the “Pattern” dither option achieves that look quite admirably. Otherwise .png files are generally too massive. If you confuse visitors to your site (the way I got confused as to what the tailpipe actually was) then they will not be doing business with you. If you’re going to put up a site make it a show-case, not a charity-case. Screw the file size anyway. Anyone who would want to do business with you isn’t going to be on dial up.
Good luck
Edit: part of the reason that I had trouble figuring the tailpipe uot is that I have my mmonitors brightness turned down low and it is LCD. Only after I turned it up was I able to decidee what the pipe was. These white pages hurt my eyes if I don’t keep it turned down. Try and take things like that into consideration when optimizing your images.
First impression: too large. Looking at flames, flames, moving eyes to the right … ah, a logo 
Consider making flame and H colour match.
White shadow looks horrible to my eyes. Either shadow or glow, but this seems just wrong.
I would remove the jaggies form the H, they’re just loud.
Try a glossy look for H+F.
Took me a while to understand it’s an exhaust pipe. That’s pretty limiting for what jobs could be associated and to whom it might appeal. For some people, exhaust pipes just stink and flames are a hazard
It should be far more efficient to do he logo in Inkscape (or another vector app). Easy and far reaching tweaking plus the ability to render to any size needed.
RamboBaby is wrong about PNGs. They can be smaller than GIFs with the same indexed colour palettes. Without indexing, they tend to be large of course, but are a fine alternative to TIFF, then.
about the logo, I forgot to say it at the top, but I did the logo in inkskape, then saved it as a png and edited the picture to add the cool effect. The image size may also changed. This was just my first concept of it and about the logo and the jagged lines, I may get rid of the jagged line, I have to talk a bit with my parter in bussiness here. I don’t think he has even saw the banner. He has saw the logo though so I’ll have to talk to him about the jaggedness. The problem with the dropshadow thing is that I wasn’t getting enough contrast with the tail pipe. I might brighten up the tailpipe, make it more obvious and that would kill the drop shadow problem.
You could solve the contrast problem with a bright outline. The tailpipe could be brighter, but you need dark colour for chrome.
I did some changes to the banner, but after thorwils last idea with it having to be dark. Hopefully this ain’t too bright. I also changed the logo and the text, and it is also smaller
That is 1000% better. Good job. I didn’t like the red B4, but it seems to work extremely well without the jaggedness. It’s also easier to recognize that it’s a tailpipe now. I see what you mean about the F loosing contrast against the tail pipe. I did a little test to see what works well for contrast and a medium-dark, gray stroke was fairly effective. It doesn’t look nearly as good as yours, but you get the idea.
A quick idea. Just throwing it out there, no obligation of course
Why not make the logo part of the exhaust? At the moment it’s a little too disjointed. Making look like it’s pressed into the pipe might be kinda cool, but I don’t know how much it would stand out 
Sorry I am not more help, but it’s looking really good!
The first logo may look less professional, but it was definitely more powerful and attention-grabbing. The trouble is figuring out why… I can think of a few things:
The glow at the end of the exhaust is too large in the 2nd image, which ‘merges’ the exhaust and the flames. That hurts the impressive nature of the exhaust pipe - it looks more like a blurred photo.
The flames need work. Now, that said, I’ve tried creating clouds using particles - I know how painful tweaks like that can be. But they really do need something - there’s too much black. Look at some pictures on a search engine to see what I mean. This one might help you - it’s a picture of a ‘fire burnout’ test…
You can keep the flames that long, but then the logo needs to live up to the suspense you create for my eyes. Try making the ‘Design Corporation’ text more white and move it down - it needs to stand out like in the first image, without the bold. In the second version, it seems to blend into all the white-gray elements on the right side of the image. And try reducing the white ‘shine’ on the letters themselves, at least where the H meets the F.
And the whole thing really does need a ™. 