X2 Power SLI34-78AGMDP, Dual Purpose / Deep Cycle, AGM, 880 CCA, 68 AH, 134 Min Res, purchased Feb 27, 2015 from Batteries Plus with 5 year full replacement warranty for ~$350. Still going strong in my Avalanche 8-1/2 years later after numerous full discharge mishaps until last week. Left switch on while working on truck and killed it for one last time resulting in a dead cell 11.5 volts after charging.
I think that I got my money's worth since I could only get a year out of Delco's 5 year starting battery due to those mishaps. Delco got tired of warranting them and refused to honor more than 1 replacement. I was also tired of dealing with it, so had to find something else.
Same battery today is still $349.99, but only 48 months warranty. Must have had to pay out a few, but I will still go with another one just like it, unless I can find the Odyssey HEPPC1500DT which has the same specs, or something else similar for less money, which is unlikely.