I hunted and didn't find a thread that seemed quite right. I've heard a couple comments about where the Perf mostly beats the standard 85kwh as being in the 0-30 range. Has anyone really heard about where the Perf beats the standard? For example, how do the both behave in the "passing" band of 50-80 mph? I'm thinking, depending on where the Perf shines, it may help me decide if it's worth getting or not.