Help me choose my system

[jkramp]

It's been awhile since I've built myself a system. I've been reading these forums trying to get an idea of what to put together. Before I do any ordering I thought I'd ask for input. I'm not putting this together for any particular reason. I'm wanting something that will work for whatever might come up such as cad, Photoshop and maybe the occasional game. I will overclock hence the reason for the Opteron. Changes/additions to the following list that anyone feels I should make, please post with reasons why.

Opteron 170 Boxed
Antec P180 Case
Antec NeoHE 550W Power Supply
Lanparty nF4 SLI-DR
2x1GB G.Skill Extreme Series Memory
eVGA GeForce 7800GT
2 Maxtor 300GB SATA Drives w/16MB Buffer


Thanks
John