Westco along with a PriorityStart! (battery saver) is a great combo.
I have both and they work great. Sometimes when my car lights are on, the next day, it still has enough power to crank the engine. (this happens about every other week)
It has higher cranking power than OEM batteries, but a lot less than your current red top. It's a lot nicer than the AutoZone, Kragen, Kmart, Walmart, etc. brands. But, they're usually only avaible online.
The only reasons to get Westco's is that it's a direct fit and cheaper than optima's.
Why would you want to switch batteries? Aren't all Optima batteries completely sealed and can be mounted in any angle? Plus, you can add more electronic components without worrying about draining your battery.