Other sites to look around in:
I like frozen cpu,theres alot of good products there but also take a look at the cases on .They have a selection that will take quite a while to go through.Probably better pricing than frozen cpu.You may want to run your board info through the memory selector on crucial and buyaib,they may/maynot have better deals.The board you have holds 8 gigs of ram divided into 4 slots,2 gigs each.I havent look any up,mainly because im scared to
but depending on the money your wanting to spend it "might" be worth looking into a 2 gig stick instead of 2 512 sticks.I do however feel you might come out cheaper buying a 1 gig instead of 2-512 sticks.Again,havent priced any lately.I like the AMD chips over pentium and also have had no complaints with NVIDIA video cards,Im not a big fan of ATI.Theres my thoughts on it,hope it helps you.Wait to hear from others before making any final decisions,thats the best advise i can give. 

