I decided to sell my current 15" MBP (late 2008) and upgrade, however having a bit of tough time deciding. I was leaning on the new 13" rMBP with 2.4 or 2.6 i5, 16gb ram, and 256gb ssd, however someone suggested that getting refurb 15" mbp (2012). They can be found cheaper and then upgraded to 16gb ram and ssd afterwards... Most of the time I use it only for browsing and watching movies, however I do use it for Photoshop when I am traveling. so I like to be able to run photoshop smoothly when needed. Differences are: Dual core i5 vs quad core i7 Battery life (not a priority but the long life on the new 13" is a nice bonus). Portability (retina 13" is much lighter and portable compared to 15"). Dedicated graphics (old 15" has the GT650 IIRC). Retina screen - retina screen on 13" vs standard on 15". They are roughly the same price here, so I could use some suggestions on this - is the new retina screen much better than the standard on the 15" model? - intel iris graphics vs dedicated gt650; how big is the performance difference, and how will it affect photoshop use? (from my understanding photoshop doesn't use gpu that much?) - older quadcore i7 vs newer dualcore i5; despite being older generation I have a feeling quadcore i7 still has significant performance advantage I believe?