Which Rig To Put New Graphics Card In?

I have decided to take some advice and go with theati 5670. I have to older rigs to choose from.

1st has Amd 64 x2 4200 2.2 ghz with win xp and 3 gigs of ram

2nd has P4 641 3.2 ghz with Vista and 3 gigs of ram

Also what brand of ati 5670

Sapphire or XFX? Both are about same price at Newegg...

Thanks

David

The AMD rig is much better.

And both graphics card brands are good, go with whichever is the cheaper.