I have a 2014 13" rMBP, just spent 2 weeks with a rMB m5, and have tried out the new 13" non-TB in a store.
I really like the rMB. I'm a software dev and didn't really sense it break much of a sweat compared to my slightly older MBP. I'm mulling over whether or not to get the new non-TB MBP or the M7 rMP. I think I'm going for the MBP for these reasons
- Better (contrast, color, brightness) screen, which will be more workable when used outside. The extra screen size and real estate is also a boon
- Better keyboard. This is neither here not there though -- the v2 butterfly mechanism feels much better to me, but it also is louder. This could be distracting in a classroom/meeting room environment, but I work remotely so it's not much of an issue.
- While I'm on the move some of the time, it's not enough that I would really care much about the extra pound. The extra footprint, for me, is more comfortable for a machine that is in use 8+ hours a day.
- Performance is about 15% better per geekbench (~6300 vs. 7200). Not a huge thing, but it is enough to be notable.
If I were a student, I probably would opt for the rMP. The pound will make a difference when moving about, the quieter keyboard will work in more situations, and the footprint will be better when using on a desk. The only thing I would think might be truly in the MBP's favor is the performance of the screen, which is a real thing if you plan to use it outside much.
You seem to be a professional, as such you owe it to yourself to go get some ports. The pure processing power out weighs the down sides. The dongle expansion opportunities also are better than the rMB. You could buy a single hub but what stops any of us from editing 4K videos of our kids?
This is important to me as a father and avid mac user for the past 15 years. I am afraid d of the day when my kids don't have USB ports. It is a tough decision but try to be brave.
Signed,
Timothy