LOL, Have you ever used Vista?
Yes, I have. Disable Aero or upgrade RAM, and the problem is solved. Compiz Fusion works fine on my dell D420 with a GMA 950/Core Duo/2 GB RAM in it, so the intel chips aren't laking in the 3D model area.
Oh, if you are going to do CAD work or other visualizations then the "geared toward being portable market" isn't for you. Get a T60.