Now I know that people will say that most of the 27" have no screen issues and the threads on these forums represent a small minority. Anyway, I've been looking at the 27" i5. There is the 2009 model on the Refurb page for $1529 (2.66 Ghz with 512 MB graphic card), whereas a new one is I believe 2.8 Ghz and 1 Ghz graphic card (I'm not really a gamer, so the difference in graphic card wouldn't be an issue, would it?) I would be eligible for the student discount if I bought new, so it would be $1899...Obviously I would like the $370 savings by going the Refurb route, but my thought process is if I bought new, I could test the screen in store to make sure there are no issues. In your opinion, would the extra $ spent be worth the peace of mind of not dealing with potential screen issues? Two other quick questions, to which ive searched, but still am not understanding the answers, as my knowledge of networking and the like is pretty limited. 1) I would not need to buy an airport just because I am getting a Mac, correct? I have the modem and wireless router from comcast, and the wireless works on my iPhone and iPad, so I assume it would, but wanted to verify. 2) Could someone explain, in as layman terms as possible, what the difference between a NAS device and an regular old external hard drive is? Thanks a lot.