Intel conroe any one you want 6300, 6400, 6600, 6700, 6800XT, but if i was u id wait for the Intel quads to come out cause games such as alan wake will require minimum a Quad core.
If you really cant wait till middle of 2007 then id suggest this
An asus Intel 775 mobo any will do, make sure to go over 130$, cause mobo is very important and you want a good one. One asus could be the P5b. Or what i heard was that ASrock was coming out with extremely good high end mobos with better price/perfomance specs. My sister has a ASrock mobo and it is very good.
ASUS P5B-E Socket T (LGA 775) Intel P965 Express ATX Intel Motherboard - Retail
eVGA 512-P2-N573-AR Geforce 7900GTO 512MB 256-bit GDDR3
Western Digital Caviar SE16 WD2500KS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive
BUFFALO Select 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300)
Antec SmartPower 2.0 SP-500 ATX12V 500W Power Supply
Intel Core 2 Duo E6400 Conroe 2.13GHz 2M sharing L2 Cache LGA 775 Processor
and a DVD rw wont cost u more than 30-40$ and that makes
2500k @ 4.5Ghz max: 81C idle 33C
8 gigs ddr 3 Kingston Hyper x T1 @ 1600mhz
Asus P8P67Pro b3.1
Evga GeForce gtx 560 at 940mhz 1gbddr5
western digital black 1tb sata3
Windows 7 home premium 64bit