I'd start with something like this. I'm guessing Newegg links and rebates will not be useful, but these are the kinds of parts that would make a good system for games:
FSP Group AURUM GOLD 650W (AU-650M) ATX12V/EPS12V Modular Flat Cable, 80 PLUS GOLD, SLI and AMD CrossFireX Certified Compatible ...
Model #: AURUM CM GOLD 650
Item #: N82E16817104133
Mail in Rebate
$164.99 -$45.00 Instant $119.99
Seasonic, Antec, Corsair, XFX, and Enermax/LEPA are other brands I would consider, but a quality PSU is essential to the long term health and stability of your system.
Seagate Barracuda ST500DM002 500GB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Model #: ST500DM002
Item #: N82E16822148767
$85.99 $85.99
Hard drive prices are still high. Look for deals, but avoid low-rpm or "green" drives as your primary OS disk because they can be quite slow.
LITE-ON 24X DVD Writer - Bulk - Black SATA Model iHAS224-06 LightScribe Support - OEM
Model #: iHAS224-06
Item #: N82E16827106333
$20.99 $20.99
One optical drive is much like another; this one has Lightscribe.
MSI N560GTX-Ti 448 Twin Frozr III PE/OC GeForce GTX 560 Ti - 448 Cores (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP ...
Model #: N560GTX-Ti 448 Twin
Item #: N82E16814127615
$299.99 -$40.00 Instant $259.99
The release of the GTX680 seems to be affecting prices in a good way, so look for deals. I think a GTX560Ti offers very good bang/buck, while offering a lot of "bang."
Rosewill DESTROYER Black Gaming ATX Mid Tower Computer Case, comes with Three Fans-1x Front Blue LED 120mm Fan, 1x Top 120mm ...
Model #: DESTROYER
Item #: N82E16811147144
$59.99 -$10.00 Instant $49.99
Cases are such a personal preference item, but this is the kind of case I like, not too flashy but with a reasonable number of included fans. This particular one doesn't have USB 3.0 front connectors, but please remember that this list is meant to be an example. A similar case with those connectors may only be a little more expensive.
ASRock Z68 PRO3 GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Model #: Z68 PRO3 GEN3
Item #: N82E16813157279
$114.99 -$10.00 Instant $104.99
I've had good luck with ASRock. IMHO, Z68 is the chipset to get.
Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 ...
Model #: BX80623I52500K
Item #: N82E16819115072
$219.99 $219.99
Not too much to say about this one. If you're not interested in overclocking at all, you can get the non-K version, or an i5-2400, either of which would be a little cheaper.
G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBNT
Model #: F3-10666CL9D-8GBNT
Item #: N82E16820231424
$37.99 $37.99
G.Skill RAM has become my first choice because it just works. I've never had to return a stick, whether DOA or later RMA.
XIGMATEK Gaia SD1283 120mm Long Life Bearing CPU Cooler bracket included LGA 2011 i7 i5 775 1155 AMD and dual fan push pull ...
Model #: GAIA SD1283
Item #: N82E16835233082
$29.99 $29.99
Even if you don't overclock, a 120mm cooler like this one will be very quiet.
Subtotal: $929.91
I made a point of not stressing your budget, to allow for variation in shipping charges, taxes (e.g. VAT), etc. I think this is a fairly balanced build that should be able to play modern games on excellent settings (many / most "Ultra") for at least a few years.