Help me finsh this build

[colin]

This computer will be used for office/work stuff, maybe a little CSS
Budget $ 500-550 to finish the comp but I dont want to over spend just want a good stable comp

Parts on hand
CPU AMD 5000 B.E. (Paid $99.00 @Tiger came with a free game)
MEM PQI TURBO 2 GB PC6400 4-4-4-12
GPU 7600 GT & ATI 1900GT not sure which one I'm going to use
Monitor 22 inch Samsung
CPU Cooler Kingwin Revolution
OS XP PRO 32bit
Sound Blaster ???
Logitech KB & G5

I need help on picking a MB that will allow me to OC (just plan changing Multi and maybe a bump or two in voltage)
also not sure on Case, PSU or HD
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Parts I need to buy to finish the build
Now here is what I have in mind.

PSU-
CORSAIR HX CMPSU-520HX 520W Active PFC NVIDIA SLI Certified Modular ATX Power Supply Retail $99
ClubIT Product - CORSAIR HX CMPSU-520HX 520W Active PFC NVIDIA SLI Certified Modular ATX Power Supply Retail

OR

PC Power & Cooling S47X Silencer 470W Active PFC ATX Power Supply Retail $66
ClubIT Product - PC Power & Cooling S47X Silencer 470W Active PFC ATX Power Supply Retail

HD-

Western Digital Caviar SE16 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive OEM WD5000AAKS $97
ClubIT Product - Western Digital Caviar SE16 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive OEM WD5000AAKS

OR

Western Digital Caviar SE16 WD3200KSRTL 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive - Retail $93
ClubIT Product - Western Digital Caviar SE16 WD3200KSRTL 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive - Retail

DD-

LITE-ON LH-20A1S12 20X Dual Layer + DVD-RAM SATA Black Triple Format DVD Writer Retail $33
ClubIT Product - LITE-ON LH-20A1S12 20X Dual Layer + DVD-RAM SATA Black Triple Format DVD Writer Retail

Was planning on a cheap but cool mid tower don't have a clue on the MB
Any suggestions would be appreciated.

 

[veg1992]

looks good.. but if you get a Hard Drive get a Seagate its a bit faster and the Corsair 520hx