Had a rMBP 256GB for work. Feel in love with it. No longer have the job or the rMBP. Need to get a new laptop. Should I go with the MBP 15in 2.3 and upgrade the memory to 16GB (and possibly a SSD later). Or go with the rMBP 15in 2.3 8GB and not have any upgrade potential? I love the rMBP and want to get it TODAY...the size, weight, retina display. BUT don't want to screw myself out of potential upgrades later. My needs: few local websites running PHP/MySQL, Coda, photoshop, possibly some video here and there. Nothing too crazy.