as US1 said they are all made by Johnson control, I get the biggest deep cycle and starting battery wally world has and it runs my system (1500 watts or so) well. Plus wally world will exchange them year after year, Im going to add another amp this spring and another deep cycle from Wally world

I buy the Exide blue tops at the locall Exide distributor, blems for 50.00 each.

I am not sold on the fiberglass mat style batterys yet,maybe atleast they want run dry and die?

I went from four interstates to two odyessey 2250 amp.....they are unbelievable....check out the specs and you will see why. $$$ but well worth it.

Yep. I bought an AutoZone Duralast 1000CCA dual purpose battery last spring. $70. I think it has a 2 or 3 yr full replacement. Nice thing is that there are tons of AutoZones around.

This is the one that I like. http://stingerelectronics.com/prodDetail.asp?strID=181

Cabelas AGM batteries 2 24's and 2 27's they are awesome and not much more than regular batteries

Another tip:
Buy a fresh battery. Batteries are stamped with a date code, either on the battery's case or an attached label. The vital information is usually in the first two characters—a letter and a digit. Most codes start with the letter indicating the month: A for January, B for February, and so on. The digit denotes the year: 0 for 2000, say. For example, B3 stands for February 2003. My Duralast I just got yesterday had a round sticker 1/07.
Try to buy from a place that sells alot of batteries so you will get a fresh one. Not one that has been sitting on the shelf all last yr. Granted it will still have the same warrenty as one built yesterday, but might not last as long after the warranty is out. That said, there are always those that are lemons from day 1.