Nex 7 or 5N

If you look for EVF,slightly higher resolution and more convenient controls go for it.

If you plan to use legacy wide angles (35mm and wider) do not do it.It is not only the matter of magenta shift with Voigtlander/ContaxG/Leica M rangefinder lenses but you'll also see other WA lenses,designed for SLRs like Zeiss C/Y,Canon FD,Pentax M,Minolta MD,Olympus Zuiko being softer in corners compared to NEX5N.

I am a little bit disappointed with my NEX7 because of these foibles and noise that is sometimes visible even at 200ASA,but I keep it as it is still a very good,capable camera.Both of my NEXes 5N see much more use though.