Personally if you are only going to be using as a body for mainly MF lenses, I would try and track down a NEX-3 instead since it will be cheapest out of the lot and the IQ is going to be the same as the NEX-5 unless you want to go for AVCHD video.
I have sat down with the NEX-3, 5, 5n and 7 running the same lenses but there is not much in it between them all when you crop em all to 100%. The improvements you will find are more in the layout, and when you start using AF lenses with em.
I have sat down with the NEX-3, 5, 5n and 7 running the same lenses but there is not much in it between them all when you crop em all to 100%. The improvements you will find are more in the layout, and when you start using AF lenses with em.