"Why not simply run 35's front & back?"
Yea, that's the obvious answer isn't it. Right now I'm running some 28mm TransWorld Something-or-others... and the reason I'm changing is that 1: My current tires have a 'commuter' tread pattern that's deep and narrow so they're a bit squirlie when cornering. 2: Said tread pattern is great at picking up and holding onto sand and pebbles, which is noisy and irritating. and... 3: 3! things! The wire bead is so tight it's impossible to mount them without prying them on with irons.
So I'm gonna order a set of Panaracers. I've had good luck with them in the past. I'll probably order 32's. I've tires as big as 38's, but they do increase drag so I'm gonna compromise. I just thought a slightly bigger tire might provide a bit extra coosh right where it's neede.
DanO