please forgive my ignorance.  Would a sg or a pg be better served with a higher rebounding ability and a higher low post rating? 

Of course they would be better served.  Now the big question I can't really anwser is to what degree.  LP is points in the paint, so drives and the like, and if your PG grabbed 3 rebounds a game, you wouldn't complain.

Thanks, but let me rephrase:  Which of those two positions would be a better use of those attributes?

Might have a little bit to do with your system.  As a general rule I'd say I'd PREFER to have more LP for my PG, but really it doesn't matter.  This guy is playing at the 2 and scoring a ton both inside and out, and the LP is definitely contributing.  I think rebounding at either guard position is a bit helpful, I'm not sure it matters which guy has it.