Well the first thing you should realise is that the MacBook Pro Retina has an 8 bit IPS panel. If you need the granularity of a 10 bit display, you'll need a 10 bit panel and even then, OS X doesn't support the 10 bit spectrum. If that's not an issue, then the Retina display should be very nice. Its high res(2560*1600), is very bright and colour accurate. The only issue you MAY have with the 13 inch model is in the GPU department as its only an integrated Iris 6100 chip. The dedicated GPU is only available with the highese end 15 inch MacBook which is an R9 M370 but its real damn expensive. If the GPU is not an issue with your design software, the best combo would be the 256GB model with 8GB of RAM. If you feel you need some growing room, go up to the 512GB/16GB combo