First: I'd get a 500-550w power supply at LEAST. Anything below 500 isn't acceptible for gaming anymore, let alone boxing lol

Second: You poor soul, you're going with Vista.(just my opinion :P )

Third: The "copies" aren't technically associated, you just have to buy them for the keys; my WoW install is a leftover BETA install, not ONCE have I installed from CDs. I run all 3 off the same install too lol; the keys are only input during Account Creation via Blizzard/WoW's website; you can pretty much take the key out and never touch the CD/DVDs.

Fourth: (AB)USE THE REFER A FRIEND PROGRAM! Invite yourself after account creation I think so that you end up getting Box's 30day Free time, then when you pay on the new account, the referring account gets a free month, saving you $15 each time, x4 new accounts = hellloooooo nurse/free time. I did this with my third acct(didn't think to with my 2nd) and am currently enjoying not having paid them more than $15 in the past month for all 3 accts lol