if they can upgrade the PC with the best CPU to a have a better videocard. It will be somewhat more expensive, of course. but then you have the best of the 2 combined. Videocards are easily interchangeable.
Or - seeing these 2 PC's have the same motherboard - ask the other shop if they can upgrade the CPU. On the same motherboard, that's even easier than changing the videocards, because there are drivers to take into account.
Kees
Hey!
I have been looking for a new gaming computer for quite af while, and i have found two, who cost about the same.
My problem is, that i do not know which one to choose :/
I am really aiming for the best gaming experience.
[Warning! Its in Danish ]
Comp 1:
http://www.komplett.dk/k/ci.aspx?sku=10456
Specifications:
Cabinet: Cooler Master Elite 430 Midi Tower Black Bl

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic