cheap is good; I checked out surly's 3/32 cassette cog and it looks good. That makes things easier since I have an old road crank I was going to use. Surly's website says that a single speed cassette cog needs to be wide so it doesn't dig grooves into the freehub body. So I guess there is no advantage in going to a 1/8 chain, cassette, and chainring over going with all 3/32 parts. Too bad because the 1/8 stuff just looks cool.