Best Bang for a ~$600 Budget?

Hello, I'm trying to get the best bang for my buck with a $600 or so budget. I have a lineup created on newegg which I may be ordering today, but would greatly appreciate any feedback and suggestions regarding it and possible alternatives... so here's what I have:

P/S Antec BP550 Plus 550W Continuous Power ATX12V V2.2 Modular Active PFC Power Supply - $59.99

Case NZXT BETA EVO Classic Series CS-NT-BETA-EVO Black Steel / Plastic ATX Mid Tower Computer Case - $59.99
LOGISYS Computer CF120BL 120mm BLUE 4 LED LED Case Fan - (x2) - $15.98

DVD Burner Sony Optiarc 24X DVD/CD Rewritable Drive Black SATA Model AD-7240S-0B - $24.99

HDD SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM SATA 3.0Gb/s 3.5 - $89.99

CPU / MOBO AMD Athlon II X4 630 Propus 2.8GHz Socket AM3 95W Quad-Core Processor Model ADX630WFGIBOX
BIOSTAR TA790GXE 128M AM2+/AM3 AMD 790GX HDMI ATX AMD Motherboard - (CPU and MOBO are Combo'd) - $178.98

RAM A-DATA 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model ADQVE1B16K - $89.99

GPU SAPPHIRE 100286L Radeon HD 4860 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card - $129.99

Subtotal: $649.30 + $5.99 Shipping (-$15 promo code + $30 MIR's) = Total: $610.29 after rebates


I've been a longtime fan of the site and community and often search the forums for answers, and today I finally registered so I could share this build and hopefully get some feedback on it... so please let me know what you think! I have the monitor, speakers, keyboard and mouse already... Pretty sure I didn't leave anything out, let me know if I did, thanks!