My vote is for the triple crank. Where I live there are lots of rolling hills - very frequent ups and downs, one after the other, and steep - and I find that sometimes I just shift the front up and down between the middle and small ring, leaving the chain somewhere in the middle of the rear cog. That gives me a low enough gear to grind up, then I can just kick it into high range as I go over the top. The gear spread seems perfect for that kind of work.