Temporary Saint, you must install proprietary drivers if you want to use Compiz or some apps with 3-D functionality. If not you can stay with the 2-D default drivers without no problems. I hate Compiz and never, for now, I use a 3-D app and I use exclusively the 'nv' driver for my nvidia card with absolutely no problems, even for my resolution of 1600x1200 (and I can go even higher!)!
K.I.S.S. ===> "Keep It Simple, Stupid"
"Simplicity is the ultimate sophistication." (Leonardo da Vinci)
"Everything should be made as simple as possible, but no simpler." (Albert Einstein)