Hi guys, I've been trying to figure this out in my head for a while and I wanted to get the thoughts of some you on what I should do. I come from a family background of IT people, and they refuse to buy used equipment on sites like eBay, no matter how immaculate it appears. So, this is where I come to my issue -- I want a very specific model computer (either the 2.26GHz 8 core 4,1 with specific upgrades or one of the quad core 5,1's...still not sure if either is the right choice, but that's a separate issue.) I currently don't have the money to buy one of these machines, and my main reason for buying one over a 27" iMac is upgradeability (hard drives, PCIe graphics, etc.) Am I better off just buying the 6,1 when I save up or buying one of these off eBay or Apple refurbished? What are your opinions on the procs/cons of either option? I have terrible luck with hardware and having an IT background myself the thought of having a system that I can get my hands in like the iMac sort of frightens me (I went back to Windows after having my 2007 iMac become too outdated for this reason.) Any opinions are welcome, as well as those regarding my issue of what used model to buy. If going used I'd like to stick under the $2,499 price range. I'd ideally end up dropping 3 grand on the 6-core 5,1 if I could, but that's a bit of a stretch with my financial situation.