OK so I think there is only the memory, the optical drive and the anti-virus left. Obviously I've already chosen windows 7 64 bit
The memory I was going to go with this, but I think it might be overkill again
Newegg.com - CORSAIR Vengeance 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ16GX3M2A1600C10
Now the optical drive is what is confusing me. I see all these different types and I'm honestly not sure which one I should get. This is the one I had picked out
Newegg.com - LITE-ON Black 18X DVD-ROM 48X CD-ROM SATA DVD-ROM Drive Model iHDS118-04 - CD / DVD Drives
The Corsair Vengeance memory you've chosen is excellent, and in fact is the identical memory that I am now using. However, the only reason I purchased 16GB, was because I got a great buy at $74.99. Truth is, 8GB is more than enough for now, and probably for the next couple of years. I've run all kinds of apps, games, etc. and never loaded more than 4.8GB of memory at any one time. So, you can save some money with 8GB of RAM.