It all depends on what you do with it. If you are staying mostly stock, and tow I would recommend KC turbos. Retain the vgt, many different sizes to keep you happy.
If you're thinking of going non-vgt, I really can't complain about the maryland performance diesel kit. hasn't gave me any issues in almost four years.
I'm running the MPD 364.5 non VGT on my 2013. It's an awesome drop in turbo, spools great, and runs even better now with a 2015+ CP4 pump. I'd be happy to price a kit out for you through PM or give the shop a call.