The Odyssey is a good battery, though getting pricey. Hard to go wrong with the brand.
For my R75/5 that uses the 680, I decided to TRY the Mighty Max brand available on Amazon for less than half the price of an Odyssey. It's only been a few months, but so far so good. My EVT needed a new battery and I bought the 20 size Mighty Max. Again, not enough time to say how it holds up.
Tom