squig
Veteran
The problem with the flip screen is it's surface isn't flat so you can't attach a z-finder to it which makes it useless for focussing. The D7100 has better white balance control, weather sealing, and longer battery run times and I expect it will have a bit of a resolution boost all of which make the upgrade worthwhile for me but I might keep the D5200 as a B cam. I never really missed the flip screen on my other DSLRs, I used a cheap 7" monitor when I needed it.