Hi...I am upgrading from early 2008 MBP 15 inch. So I know any of the new laptops will be much more powerful. I will use the Macbook probably 50% at my desk and 50% on couch/bed. Rarely take it out of house. (Prefer laptop to iPad) Used to 15 inch screen but want to get Thunderbolt 27 inch display for use at desk. Dont want just iMac. Want flexibility to be able to move from desk to rest of house without "skipping a beat"..i.e unplug from Display, open laptop lid and keep going with video or whatever. Usage is very basic...web, email, youtube, no gaming...so I am trying to decide between MBA with i7/8/256 or rMBP 13 with 2.4/8/256. I imagine either would be fine for my needs...my eyes are getting old so retina may be better for when just using laptop. Is the retina better at driving the thunderbolt display since the Iris graphics are better? I have looked at both in the store...still torn...retina seems to make more sense...but there is "something" about the air that draws me to it?