DosMars:
A number of us here are using AGM batteries purchased from
Deep Cycle Battery San Diego
They are 175AH Alcatel-Lucent AGM batteries for $125......a lot of bang for the buck....and they will deliver to OC (and possibly Long beach) if you are buying a couple or if they are heading your way for someone else.
If these are of interest, go to the website, call the number and ask for Jeff.
One caveat: These are not standard automotive "group" sized batteries....they are a little smaller than a size 4D.