Didn't opt for the retina -didn't like the glossy screens so got the 15" pro w/the matte screen option.
I prefer the 13" for portability and the reduced glare on the new 13" retina has me considering that - ideally I would like that and a desktop machine. The new imac w/a Pegasus thunderbolt setup and a 13" retina would be the best of both worlds but if I had to choose one I'd go w/the 2.3 15" macbook pro and upgrade the RAM yourself.
I prefer the 13" for portability and the reduced glare on the new 13" retina has me considering that - ideally I would like that and a desktop machine. The new imac w/a Pegasus thunderbolt setup and a 13" retina would be the best of both worlds but if I had to choose one I'd go w/the 2.3 15" macbook pro and upgrade the RAM yourself.