Hi David, glad you're enjoying your system. For the meter, it's not at all important where the db reading is as long as you adjust the individual speaker levels so they're the same db reading for all the speakers. Volume will be relatively unimportant as well; just get it loud enough so it registers something for the meter to read. Crossover is entirely up to you; try changing it and see if you like one way over another. Same thing with EQ, though most folks have reported better results without it.
Hope this helps, happy listening!
- Oliver
Oliver Amnuayphol
Home Theater/Audio Guru
Aperion Audio