Re: slowing down help
The 36T will get you more speed.. in the top-end, on flat ground. I use one myself (I'm also a skinny guy). It takes a little time to build up speed but you will get a higher top speed out of it. You'll definately have to work along with it on hill climbs.
The fewer the teeth, the more top speed you'll eventually get, but with more teeth you'll have better power and torque in the low to mid throttle.