Come back a few weeks before you buy for a final check. By then, nVidia's Fermi may be available, which might change recommendations. In addition, there's a lot of new tech on its way in too...
I'm using all Newegg.com prices, so it's in USD.
CPU: i5-750 $200
Mobo: Asus P7P55D-E Pro $190
RAM: G.Skill Ripjaws 2x2 GB 1600 mhz CAS Latency 7 $110
HDD: Samsung Spinpoint F3 500 GB $55
PSU: OCZ StealthXStream 700W $60 after rebate
Case: HAF 922 $100 (combo with PSU right now for $130 total, usually ~$80)
Optical: Cheapest SATA DVD burner $21
GPU: HD 5770 $155