I did a lot of studying about the systems and reading on this forum BEFORE buying the iMac 21.5". I then went to the local Apple Store and looked at both the 21.5 and the 27" system. In October 2010 I decided on the 21.5. Don't get me wrong, I love this system after converting from a PC (15 yrs) and the system has not given me any problems at all. One thing that kinda kept me from buying the 27" were the monitor problems I was reading about. Price was NOT a factor. I had also measured the distance between my monitor and my face and decided that the 21.5 would be a better system for me. Buttttttttt......recently I have had more and more desire for the 27" system or even a separate 30" monitor. So much of a desire that I am wanting to purchase the 27" iMac or the 30" monitor....just for the bigger monitor....not the system. So I am asking the forum, what do you suggest I do in making the transition. My iMac is the basic i3 system, bought 85 days ago.