Speaking of DieHards, I bought 2 Platinums for my Dodge diesel dually after I found out that they are basically relabeled Odyssey batteries! I had an Odyssey in my race car for a while with great results and the DieHard Platinums are the same thing, but less expensive. I don't plan on ever getting a conventional lead/acid battery again for anything I own.
I don't care for a Walmart type warrenty that you can keep going back to replace batteries on a regular basis, even if it's for free. How much is your time worth and how often do you want to risk getting stranded somewhere?