OK, this is the build you posted a few posts earlier, with the changes I've seen it comes to $616, not counting shipping rates or sales taxes, you still need a good PSU and change the Caviar Blue for a Caviar Black, your call.
$205 cpu-Intel I5 2500k $205
$100 motherboard-Biostar TZ77B Motherboard $100
$25? Samsung RAM
$150 Radeon 6850
$75 storage-Western Digital Caviar Blue 500 GB SATA III 7200 RPM 16 MB Cache Bulk/OEM Desktop Hard Drive - WD5000AAKX
$?? PSU
$40 case-NZXT Technologies Source 210 Computer Case (Black) $40
$21 optical drive-Asus 24xDVD-RW Serial ATA Internal OEM Drive DRW-24B1ST (Black)Budget: Price Range + Country $21
this is the new list i made yesterday with some minor changes.
CPU -Intel Core i5-2500K 3.3GHz Quad-Core Processor $199.99 @ ncix us
Motherboard- Biostar TZ77B ATX LGA1155 Motherboard $79.99 @ newegg
Memory- Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory $54.99 @ newegg (can't find the 2 "2gb ram stick")
GPU- Sapphire AMD Radeon HD 6850 1GB PCI-E Video Card (100315L) - SAPPHIRE $135 @ amazon
Hard Drive- Samsung Spinpoint F3 500GB 3.5" 7200RPM Internal Hard Drive $79.99 @ newegg
case- NZXT Source 210 (Black) ATX Mid Tower Case $39.99 @ amazon/newegg
psu- Antec 450W ATX12V Power Supply $34.99 @ amazon if that is not enough then my second choice is the "Antec NEO ECO 520C 520W Continuous Power ATX12V v2.3 / EPS12V 80 PLUS Certified Active PFC Power Supply" $59.99 @ newegg
so it came out $650. i decided not to include optical drive because i don't think i need it now. only going to be downloading games from steam.