#1. "RE: D7000 soft, not sharp?" In response to Reply # 0
If you're using the prime lenses at f/4 or so, then they are always likely to be sharper than a "kit" zoom used wide open. But if used - on the same subject - at around f/8, I doubt you (or anyone else) would see too much difference.
This discussion may be continued in this earlier thread on the same subject, where members were advising you on how to compare the different lenses.