There are some cheap 2gb kits of DDR3 for sub $200, but not really worth it IMO, Raptors suck, they aren't worth it because there are 7200.11 HD's that are the same speed, less price, and way more space!
as a matter of fact insane, the reason i mentioned it, is that im selling mine. Got a new lian li as a present and i have no need for mine. Mines the black one. Ill add all the extra fans that arent included from newegg, and a card reader. Its not old at all, only a month or two. No scratches of anything wrong with it. 180+shipping. Are you intrested?