So I ended up going with another hackintosh. After reading how hard it is to open up the new iMacs and the fact that the 21" doesn't even have a ram slot, I feel more comfortable going this route. I may still get one eventually but for now this is much cheaper. I upgraded the cpu and motherboard for $250 and it's a faster processor than the iMac has. I also went ahead and bought a 128 GB Samsung SSD and setup a Fusion Drive last night. This has been the easiest hackintosh I've had to build. Very happy with it. Just thought I'd share in case any one is in the same position.