According to pro sound guys I know and manuals I have read for various pieces of equipment I have bought, you should keep the amplifier power up as high as possible and control volume with the mixer. Most say to keep the master volume all the way up (in this case your remote is the master). The only time this would differ is when by having the master all the way up you have no control with the mixer because you can't raise the mixer volume without causing feedback or other problems. In that case you should back off the master so you have some movement on the mixer.
If you run the mixer on full that can overdrive and then distort, the mixer should never be higher than the master. Even on the mixer itself you should not have a channel strip level higher than the master out.

The goal, so they say, is to have enough power to drive the speakers while controlling the volume.

That is my understanding but of course you ears are the best judge.
The bass I would start at mid level and adjust accordingly to your likes.

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[This message has been edited by mikeathome1 (edited 12-19-2004).]