This model is close to the one I have, and it isn’t as bad as munkey makes it out to be. Mine does occasionally have problems with overheating, but I’ve come to realize that a simple cleaning of the fans helps a great deal in that.
The main reason mine has that problem anyway is because mine is a customized model that the design wasn’t exactly built for. I would say that it has definately been worth the laptop route even though I didn’t have a specific need for a laptop that I couldn’t live without. I use the mobility for everything except my lecture classes, and that is mainly because I opted for the 17" screen which has been completely perfect with Blender. My point is that mobility comes in useful in many places where it wouldn’t be expected. I may be more biased for this because the psych lab I work in requires me to work from home (or wherever I need to be), and I am also required to regularly bring in my work. Being able to use my own computer for this has proven valuable in ways that I wouldn’t have guessed.
Even through all this though, I would suggest a desktop unless you are completely positive you want a laptop. I obviously love mine, but the price difference is insane between the two, and for what this laptop cost I still sometimes wish I had the enormous amount of power that would have been available through a custom built desktop.
I’ve also been running into a pretty significant problem lately because Nvidia doesn’t support drivers for the mobile video cards. HP hasn’t released an updated driver since I got this computer in january of 04. I’m now running on a modified forceware (I’m pretty sure that’s right) driver because the latest games (F.E.A.R. and Age of Empires III demos) I have played have required a version of directx 9.0c that isn’t compatible with my GeForceFX go5600.
Hope this helps,