The battery in my 2005 XB9SX Lightning is getting up there in age and since I do a lot of long distance riding I will be purchasing a new battery this Spring. What are the best options? So far I have narrowed it down to either the Deka/Big Crank for $75 on Amazon shipped, or the new Deltran (Battery Tender) Lithium Iron Phosphate for $99 on Amazon shipped. Are there any better options out there and which would be the best to choose? Thanks!