Originally posted by ElJamoquio I consider the in body stabilization and the anti-moire function 'useful' features, worth $100.
I never used the anti moire function of the K3 and never found any moire in my shoots. When it happen, you can remove it in PP with DxO for example, just push a slider. For me this is a nice marketing move and sure helped the camera of year thing but for practical purpose this is useless. Well maybe not if your are into fashion, but that's it.
In body stabilization is really great, I love it for my small Pentax lenses
. Not sure it is really key on modern lenses if you are not size/weight bounded. Optical stabilization seems to work little better, for tele it is really better.
On the opposite the D7100 AF is far better for actions/sports.
In the end I would call it a draw even through I love my Pentax and doesn't want a D7100.