thanks for the help guys, i just have a few more questions...
if i get a vanilla 6800 and manage to unlock the extra pipes, would it be bottlenecked by my system and therefore i would be better off with a 6600gt?
i found a eVGA 6600gt at ncix for 180CAD, is there any other place in Canada where i would be able to get a 6600gt cheaper or a 6800nu for under 200CAD?