congrats on the new camera! A word of warning concerning lens compatibility. NIKON brand lenses of course are not a problem, you need to be a little careful with third party lenses on the D7100, especially SIGMA. there are lots of reports on the net of people having compatibility issues. I for one have had problems with the new 18-200 from the contempory line, I know also that the 17-70 and 17-50 are also effected.