-Caught some major problems worse than just a power supply-
Whoa whoa, why are you going ddr2? The motherboard doesn't support ddr2 anyhow. ddr2 is expensive and outdated since ddr3 has got much more common and cheaper.
Newegg.com - CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMX4GX3M2A1600C8
There's some ram that'll be better than the ones you picked, as well as cheaper.
And if you're in the united states, try newegg.com... Overall you'll save on shipping by buying all there (if you can) and get better parts than bestbuy.com for example. For $60 you can get a 750GB to 1TB hdd. Oh, and if this is a new computer, do not go with ide, go with sata. You'll only be paying more than you need.
By the way, how much do you want to spend on the hard drive? If you are spending ~$200 you can get a small but fast solid state drive for your OS and a 1TB hdd for the programs/storage. You'll have very fast performance with a large drive that'll still get 100+MB since it's a dedicated hard drive with no OS on it.