40mph of course! I'd probably spend most of my time between 20mph and 30mph but the extra power might come in handy. The special front crank is expensive but I want to contribute past 25mph.
It'd be very economical if replacement batteries at 15k - 30k mile intervals didn't cost $1k. I could feasibly sell my 2000 Volvo and rely on my 97 pickup truck, the trike, and my other traditional bikes. Having the GTO as a second backup wouldn't be that much of a hardship.