My recent DIY daily use computer

AMD Phenom II X4 955 Processor-Quad Core ......................................... $99.99
(This CPU does not come with a cooler/fan)
ASUS M4A88T-M Motherboard ................................................................$84.99
(Things like SATA3 6GB/S and USB 3.0 are must have)
Crucial Ballistix 2x4 GB RAM - DDR3-1333MHz ....................................$41.99
(Not the best but does the job for the price)
Western Digital - SATA 6Gbps, 7200 RPM, 32MB cache .........................$89.99
Cooler Master TC101B Mid Tower Case with 500W Power Supply..........$39.99
(Be aware that the PSU only comes with 1 SATA power)
..........................................................................................................Total: $356.95

Ultra High speed RAM from G.SKILL

G.SKILL Trident X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model F3-2400C10D-16GTX

2400 MHZ speed, but timing is  10-12-12-31. Its super fast if it could be lower to 10-10-10-31. They are super expensive BTW.

Edited: 6/28/2012

It is also Intel XMP 1.3 Ready for 3rd gen Intel CPUs, so I believe it could set to extreme low timing.

Last Gen I7 2700K deal. 50 Dollars Saving

Intel Core i7-2700K BX80619i72700K Unlocked Processor - Quad Core, 8MB L3 Cache, 1MB L2 Cache, 3.50 GHz (3.90 GHz Max Turbo), Socket H2 (LGA1155), 95W, Fan, Retail