+1 :) I use the exact same machine and I simply don't want to upgrade it with the current options.

I don't even need anything higher resolution (retina is great), honestly. In fact, I don't even need a more performant (or more cores on my) processor (my quad-core i7 works great with everything), or better GPU - all I need is:

- 64GB RAM;

- 2TB SSD;

- better camera.