What kind of difference should i expect from the 2012 to 2013 model of the mini? And how would it compare to a rMBP while connected to a thunderbolt display? I am on the fence between getting the base 2012 mini used on CL or Kijiji for 400-450$ or waiting for the new one to get released. The main purpose of the mini will be to act as a server for my large iTunes library and all the stuff that comes with that, handbreak, etc... Currently the job is being handled by my rMBP and as a result the computer spends most of its time hooked up to my thunderbolt display and numerous external hard drives. As a result i want to "liberate" my laptop so i can actually use it as a portable computer. I tend to upgrade fairly regularly but this is not something i want to be doing for this Mini, i need something that will do the job for 5+ years and since i am planning on getting a 4K tv in the next two years i would like it to be able to handle 4K as well, is that even doable? Is it worth waiting for?