re: I don't know who .......
Chris,
I agree on the need for a second LRO. Perhaps MRO could do the first quick survey of the Moon and then the optimized LRO could follow it.
But given that MER has achieved the main goal of NASA's Mars exploration strategy and found water do we really need to send any more spacecraft to look for it? Why not go to the next step and start the direct search for life on Mars?
So far none of the spacecraft NASA has planned have any experiments to search for life. Maybe NASA should wait until researchers develop such packages before sending anymore spacecraft to Mars. Afterall isn't the discovery of life NASA key goal for Mars research?