So i already ordered (and is now shipped) a refurb 2.2/4gig/750gig/1gig graphics for $1899, but now am thinking I would rather have the 8 gigs and high res... THe difference is actually $430 plus tax, which is a lot... Few questions: 1) If I decide to BTO then do I have to wait for this other computer to be delivered first then return it? And I guess I have to ship it back and not take it to an Apple Store right? 2) Could I just order an 8 gig kit and replace the ram myself? Is it really only $89 from crucial for 8 gigs? man I haven't bought ram for a while... Thanks guys, P.S After typing this out, seems like I will be paying $400 for hi-res... kinda dumb (assuming the ram really is that cheap).