Odyssey make good batteries, from what I hear. I just did a search for my Blast (same deal - you should have an AGM (Advanced fiberGlass Mat) gel, sealed battery.
Do a google search for Deka ETX14, or just go with the Odyssey. Look for a long warranty. From what I have seen, the Odyssey pc545 only gets a two-year warranty for powersports use as opposed to automotive. I think ophawk got lucky, and they did right by him. Saw the Odyssey for $118. Probably will last twice as long as one you can find for $60-80 range.
Deka ETX14 is, from what I understand, the OEM battery (re-badged as HD).
Having a good battery, well-charged and maintained, will save your butt, save your starter and voltage regulator, and help your bike to run better.