Send the rMBP back, sell your 2011 air and get the 2012 air. The main difference between the older 11 models is the GPU - the 2011 air can only do 1x thunderbolt display with its Intel HD 3000 integrated graphics. The 2012 Air uses the Intel 4000 integrated graphics, and can drive two thunderbolt displays plus its own display.
Get the Air - its a MUCH better deal than the crap 13" rMBP.
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Sorry to jump into your convo here, but could you actually explain what the 13" rMBP has that makes it so attractive over the 15". Weight cant be it because the difference in weight is tiny. Thickness cant be it as the 15" is THINNER than the 13".
I find it hard to buy that people are going for the 13" just to nock off 4.5 CM from the width of it.
Well, here's my usecase;
I mostly use my current 15" MBP (4Gb C2D) for writing and a little web dev. I use my work-supplied 13" MBP (8Gb i5) for webdev.
As a
writer, size and battery life are seriously important, followed up by clarity of the display. I do not store files locally.
As a
web developer, I need something reasonably fast (it has to run PhotoShop a few times a week). I do not store files locally, so a big disk is not needed. I dont run a lot of programs at once, so 4-core not critical.
The 13" i7 retina offers a balance for my needs:
1) It's smaller than my 2008 15", and weights a *lot* less.
2) It has a retina display (hiDPI testing of site and assets; I can do this on iPad3, but no way to debug sites on iPad)
3) It's fast - the i7 will floor my poor old C2D
4) It's not as expensive as the 15" retina.
5) ...and I have a 9mo baby daughter, so £300 difference means a lot to me right now
Other qualifying reasons:
At home I have a Mac Pro with ~4Tb of disks and a 30" ACD that we use as a home server & for "big" work (it has 12gb RAM). We also have a 2011 iMac.
If I had the money, I'd've gone for a 15" rMBP with 16Gb and 256Gb SSD, but £2200 buys a *lot* of pampers & baby milk.