So I would like to add a singlespeed to my quiver. The hubby rides a Kona Unit-29er, which I've ridden a few times and liked. But I want to see what else is out there. This is sort of a new thing for me, and I really don't know much about singlespeeds. I don't have oodles of money to spend, but I would like to get the best bang for the buck. Any suggestions?