Well although some people prefer Intel... this is a rig I highly recommend.
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16819103773] AMD Athlon 64 X2 6000+ (Dual 3.0GHz)[/link]
$160
Benefits: Not too expensive, can burn a DVD while playing TF2 with no lag (I've tested). AMD.
Cons: Slightly expensive compared to some of the nicer Intel processors.
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16813131022]ASUS M2N-E AMD Motherboard[/link]
$94
Benefits: A mid-range motherboard, not cheap low quality dirt but not the really expensive ASUS motherboards. Oh and it is Asus.. an awesome brand.
Cons: RAM has to be 1.8V if you don't want problems. Isn't PCI Express 2.0
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16820146118]Mushkin 2GB (1GBx2) DDR2 800 RAM[/link]
$50
Benefits: Works well with motherboard, 2GBs runs perfectly with Vista, etc. DDR2 800.
Cons: Only 1.8V
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16822148215]Seagate Barracuda 320GB 16MB Cache 7200RPM[/link]
$95
Pros: Inexpensive, 5 Year Warranty, lots of space, 16MB Cache and can transfer up to 85MB a second.
Cons: Not a 10,000RPM drive.
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16814127303]MSI RX2600XT 512MB GDDR4 128-bit PCI Express x16[/link]
$144 after rebate
Pros: 512MB, can run Crysis at Max Settings with 4X AA
Cons: Not PCI Express 2.0 (2.0 doesn't work with mobo), 128-bit, uses 169W of the bat.
Mixed: Huge!! (dunno if that is good or bad)
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16811156078]RAIDMAX Smilodon Extreme Black Case w/ Window Panel and LEDs[/link]
$80
Pros: Attractive, Nice LEDs, Inexpensive, Windowed Side Panel
Cons: No Power Supply, LEDs might get annoying after awhile (depends on you)
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16817341002]OCZ GameXStream 700W PSU[/link]
$99 after rebate
Pros: Lots of watts, high quality brand, VERY inexpensive after rebate, long cables, aweeesommee.
Cons: Rebate isn't always goin to be there! (so act fast!)
[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16827106072]LITE-ON Black 20X DVD Burner w/ Lightscribe[/link]
$37.99
Pros: This brand is something I've never had anything but happiness. Great, cheap.
Cons: Not commercial grade
Not sure I am forgetting something... but this is a cheap, great gaming rig for people who don't feel like spending 3k.
Total Cost: $661 w/o tax or shipping.
It is a lovely PC. This is a suggestion for those who want an under 1k build that rocks and doesn't break the bank (too bad

)