Optima Red Top (great battery but expensive)
Energizer (no, really, I had one sitting for 6 months with no charge and after charging it, it works great, about 4 years old in the AZ heat)
I generally would say anything AC Delco, but their batteries are terrible. You really notice how bad they are here in AZ in the summer. You're lucky if the 6 year batteries will last for 2 years here!
My buddy works in the parts department of a Cadillac dealership, and he says the AC Delco batteries are some of the worst ones on the market. The only reason he or I use them is that we occassionally get them for free...