i love my optima blue top (same as a yellow) because i run so many accessories off my battery and its never failed to start my vx.. even after running my system (draws about 40 amps) for 2+ hours at a show my vx started right up no problems.. and the extra terminals are nice too... before that I had an energizer battery that was pretty sweet, right now i keep it in my basement for testing accessories before they go out to the vx.. just have to recharge it like once every couple months.. pretty awesome