That's something I do like about the 5 speed thing...I can use the gears for what ever coming down the road. I want 5th for the fastest desert stuff and for when I drive on the street. I don't want to gear it 'wrong' and have the power in the wrong places.
The RC is pretty long legged, I was 13T x 60t and 22" tires...clutch chatter was horrible getting it rolling. I know I need to be deeper than that (4.6 to 1).