I had a red top Optima in my winter beater and it was sitting for 4 months without starting, and it started up fine. My dad had a interstate in his Mark VIII and he had it sit for 2 months and when he tried to start it, all there was was a click. He put in a red top Optima and it starts fine every time, sometimes it sits for 4 weeks without running.
My vote goes to Optima.