I was going to go for a refurb 3.06ghz iMac with the 8800GS video card in it for $1900, but somebody snagged it before I could. I noticed on another forum that apparently you can buy the Mac Pro and "downgrade" it to the quad 2.8 for around $2200. Since the 3.06 refurb is gone I'd be spending that kind of money anyway or getting the 2.8 iMac with 8800GS for about the same price anyway. So, it pretty much seems like a no-brainer to go with since I have a monitor, keyboard, mouse and even an extra 130gb raptor drive that's not being used. So now for my questions.... 1. I'd like the 8800GT card, but that's an extra $150 to buy custom. Is it possible to buy the 8800GT from Apple later and install it if I want/need it? 2. Down the road would it be possible to upgrade from quad core to the 8-core CPU? Not that I could imagine needing that kind of power, but just so I know. Thanks!