Use this (or google to find another) to calculate your power needs.
http://www.rvsolarelectric.com/index...directory_id=3
As for batteries, for the most efficient system they should be the same, even manufactured at the same time.
I have two 6v T-105's and 200w panel which will allow me to draw 100ah/day though with only 200w solar it would basically take one and a half to two sunny days to recover from that here in NH. You seem like a heavy current user so you may be looking at more batteries and more solar.