Is this the 2012 model that has user upgradable ram to 16gb? If so am I the only one that thinks at 999 (student discount) this is a hell of a deal. Atleast I will be able to upgrade ram and hard drives in the future.
This is where I can still recommend the 13"cMBP. If you go for the rMBP, I say you need to at least get the $1500 model. A $1300 computer with 4GB of soldered RAM and a mere 128GB SSD is not a sound investment IMO. At least with the cMBP you can put in 16GB of RAM and 960GB M500 SSD later. You aren't going to see the performance increase of the Iris over the HD 4000 unless you turn he resolution way down.
For $50 more than the base 13" rMBP, you could get the cMBP with the i7 upgrade.
Of course, it all depends on what your priorities are. The rMBP is of course lighter, thinner, with a significantly better screen. For me, for practical uses, I would get the cMBP over the base rMBP. If I can spend the extra $200-$300 I'd definitely get the 13" rMBP.