Sams sells those exide batteries which are OK. I've had red tops in both my XJ and my daughters TJ, both are going on their third winter, get parked outside and I got them on sale at AA for $89 + tax so they were under a $100. So far no complaints. A month after I got it I left my headlights on all day in an underground parking garage for a microsoft road show, then went to a movie, those lights were on for a good 10 hours. When I got back I figured my goose was cooked but turned the key anyway, fired right up.
As far as the yellow tops for a DD starting battery, not a good idea, know alot of other jeep owners that did that and all around the same time 4 years ago, seemed to be flurry of the yellow top craze plus the optima dealers where having some killer sales, yellow tops for $100. About 2 years later there was also alot of posting about yellow tops going bad from the same people who bought them during this period. No idea why unless they need to be deep cycled and recharged on a semi-regular basis. I'm figuring 2 maybe 3 more years out of ours and then it's time for another. My factory OEM battery lasted me about 5 years before I figured I was pushing my luck, hence the redtops.
The blue tops are also a deep cycle but are made to be more shock resistant than a standard battery, don't know how they would work long term in a DD situation.