If you want a kickass graphics card for a semi-cheap price around 300$~ on amazon or a site similar, you should get the 5850, the performance of it will blow your mind. (unless you get something even higher..)
ya, but the 8800gtx wont last much longer...
the last pc would be hundreds for toribash, no complaints at all.
i would still rather go a bit higher on the gfx card though. 5770 is a very popular card atm. the main difference(im just guessing here) is that the 5570 is ddr3, while the 5770 is ddr5.
i know it wont last much longer i'm just making a reference as to the fact that my card can run raytracing just fine, so basically my point being you don't need to go all out on a graphics card to get that extra effect, your pc with a 5830 ati will handle it no problem but i would still go with the geforce 460 as that's one hell of a deal