Decided to take the plunge and switch to mac from pc. I love the 27" but it is too big for my desk area. The 21.5 seems a bit too small though so I was considering picking up a preowned 24". I plan to keep it till dies, got 8 years out of my PC and its still running strong, just want something different. I am concerned about 3 things tho, 1. Buying preowned instead of new, I can not get apple care. I am fairly tech savvy and have always worked on my own pc's but I have never cracked open a mac. On the plus side, I would save about 400-500 bucks up front and maybe get some extra software. 2. Outdated technology. Which 24" model would most closely compare with the performance of the new base 21.5"? And how would they compare to each other? I really don't do a lot with my pc, nothing majorly intensive right now. So I think I would be fine, but do kind of tend to obsess a little bit about getting the absolute most bang for my buck. 3. Identifying the age and performance of the 24". I have tried to look up info on it but what I find is outdated, I know they made this size for what? 3-5 years? While I think saving 400 bucks and getting the larger screen is worth going with a 2 yr old model, it isnt worth going with a 4 or 5 year old one. I guess last questions are, how hard are they work on yourself? How are they performance wise compared to the new base 21.5? Thanks a lot folks.