Well AMD sort of lost they edge.. Now they are still cheaper but they are also slower. I general they are the same amount cheaper they are slower..
The Intel you linked however suck big time. It have a L2 cache at only 512 Kb (yeah not even 1MB) so every threat dead you get will kill your gaming xp (and trust me that will happen). So I would go for the AMD too if you have to take one of the two, it have 2MB L3 (yeah L3) cache this will make it way more stable.
Now you need to know that the two computers you linked would not normally be sold as gaming computers, I think that they only call them that cos of the casing they are in.
The Intel one would in my world be sold as a computer for ppl that just need to check e-mails, word and home banking.
The AMD would be, in my world, be sold to a small business or to a student that need to run programs that use multicores (math programs, vector-grafic programs stuff like that).
My 2cp: find another computer thats not cased in something shinning.. And if you cant live with a computer that is not shinning then buy a case for it =)
I use this computer for gaming atm:
2.93GHz Intel Core 2 Duo
1066MHz frontside bus
6MB shared L2 cache
24-inch (viewable) glossy widescreen
1920 by 1200 pixels
4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM
640GB Serial ATA, 7200 rpm
NVIDIA GeForce 9400M with 256MB of shared DDR3 memory
NVIDIA GeForce GT 120 with 256MB of GDDR3 memory
Yeah it cost 1.799,- but then I have everything in one computer screen drive all. And i dont have to have a stupid box standing there looking like crap =)
Quality beats quantity everyday...
- decker