A couple of images from last winter…one playing with reflections…the other to warm me up… full size http://imageshack.us/photo/my-images/708/onthenotroad7.png/ http://imageshack.us/photo/my-images/9/wheninisoutfin.png/
The first one: The modeling looks good to me and reflection but don’t fit very well with the bg in terms of light. Maybe turning off the GI and playing with more lamps you can improve it.
The second one: I think needs more work on it in general, but I love the concept, is nice 
Just my 2 cents! Happy Blending Frank 