Re: Should I buy the 13 or 15" MacBook Pro w/touch bar?
All the above are great points.
It comes down to two things: (1) What are you going to use it for, and (2) What can you afford?
I personally have the 2016 15" MBP, touch bar (highly overrated, don't use it much) i7, 16 gigs ram, 500gig ssd. Why a powerhouse? Two reasons. First, as a network admin and having to support Winders, I'm running Parallels for virtual machines. Second, as a photographer, I'm also running Adobe Lightroom and Photoshop. Since it was last years model, I got it for around $2200.
Also look at this this way. What might you be using it for a year from now? That may also help in your decision.