AA rechargeable LiIon batteries (4 pieces) which would totalize ~6v (not 4.8v) to gain in more AF speed
would solve the problem (with the ability to use 4 NiHM batteries also).
If not, LiIon batteries (K7 or K10/20 compatibles ones).
Others:
-WR kit lens to match the camera's WR
-same K7 sensor
-same AF system like K7 (if not newer
)
-same pentamiror from K200/K100
-LV
-eventually video capability
-top LCD , like K200
-more or less, same materials for the body like K200
-eventually AF assist lamp
-~3-4 fps
-if K7 ~ D300 and K200 ~ D90 and K-m ~ D60 then an extra select dial like K7 (and D90).
-...
These would
some of the reasonable features for a camera in this class (mid level - for an amateur/enthusiast photographer maybe even a beginner - P&S comming one).