OvS,
I've got a suggestion for an array that may just rekindle your interest in PC gaming completely. I've kept it within your budget range, bearing in mind that you mentioned you already have suitable hard drives. Sounds like you're planning on using your existing case, but you may want to check and make sure it'll accommodate the suggested power supply. This thing is
BIG, but you can disregard the spec that says it'll handle 2 8800GTX or
lower. It'll run 2 GTX280's without skipping a beat......trust me. By
far the best PSU on the market in it's price and spec range.
I've included the Antec 900 in the hardware list as I happen to
know it's reasonably well suited to the suggested build. Cable management can be a bit tricky as it uses a bottom-mount psu design (Run the mobo power cable
underneath the motherboard
before seating the board). You can always opt for a case that allows for a top-mounted power supply if it becomes a concern. The other thing you need to consider is the dimensions of the newer video cards. The GTX260 is a
big piece of hardware. I have my doubts that your current case would have room for it. Proceed with caution when considering the case's interior dimensions.
One thing I
can tell you...with this setup you wouldn't have to worry about any upgrades for a
long time to come. With that in mind, the suggested motherboard allows for both Crossfire
or SLI arrangements and has "futureproof" written all over it. It truly does allow for significant future upgrades
if the need should ever arise.
I'll do you a favour and leave out all the techno-babble based, bullshyt baffles brains, cache-this, volt-that, RAID-those, lap your silicon surfaces, and replace your mosfet heatsinks with miniature aftermarket Toyota radiator cores for better cooling nonsense that usually accompanies these types of hardware suggestions. (No need to thank me

).
All depends on just how much you wanna' spend. If you're really trying to save a bundle, Pol's suggestion of the last generation stuff is certainly an option and would also serve you well...and save you some cash.
Case
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129021 =110
PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703009 =105
MOBO
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131359 =250
CPU
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115202 =295
RAM
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145223 =159
GPU
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130428=285
LCD
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236049 =290
Total Cost=$1494
Cheers,
Parky