Hi I'm considering replacing my 2010 27" iMac with a 15" Retina Macbook Pro, this is my first tricky decision. However, mainly, I currently have a 27" Apple Cinema Display, if I was to get a Retina Macbook Pro, would my eyes go crazy when using my cinema display (with my Macbook connected)? I know it will work fine, however my past experience with retina displays, iPad, iPhone, going back feels horrible. For those who use a Cinema Display with their Retina Macbook Pro, does it feel fairly unusable after adapting to the retina display? Just wondering how you feel about it, if you dropped one display for the other or manage find with both. Thanks.