Help me design a VALUE gaming system

What I want is a value gaming system. I want to design this to run modern games, and maybe for about 1 year max in the future. I want it to run these pretty well though. I also want the price to be fairly low. What I was thinking was to get a cheap AMD, but I'm not sure which one would be best for value/price/performance right now to just run modern games. I don't want it to be extremely future proof, as I will be building a Conroe system in the next 6months or so to be my futuring system. What I want is something I can build for a fairly low budget right now, that will get great frames and good performance on games that are out there or to be released soon. Doesn't need to be Vista ready, as I will probably just run XP on this system until I decide to get rid of it. I think XP compatible games will still be availible for the next year or two atleast, so I don't think thats too much of a problem.

I have a monitor/keyboard/etc.

I also have a ATI x1900xtx I will be transfering to this machine, as the machine I have it in right now is not giving it its due.

Any ideas would be much appreciated.

CPU: AMD Athlon 64 3500+

Mobo: Asus M2N-E

RAM: Corsair XMS2 1GB (2 x 512MB) DDR2-800

Hard Drive: Seagate Barracuda 7200.10 320GB SATA2

Power Supply: Antec Truepower 480W

Actually.. I'm going to revise my earlier suggestion with the Athlon X2 3800+. This way it will definitly perform better for gaming than your current system until you build the Conroe rig.

The Asus M2N-E is about the best AM2 board you can get. I say this because SLI is a waste of money unless you're going to be gaming at a screen res over 1600 x 1200.

The 4000+ is another good option.