32s. I Think the plusses run a little small. They're better rollers than the cyclocross rubber I had on the bike for a while. Definite tradeoffs. I've yet to put a hole in one, and that's great for urban streets. I work right at the edge of town, so I get both broken glass and general debris and a lot of goatheads in summer/fall. But by the same token, the weight of the tires is most apparent when accelerating from a stop, which you probably do a lot of in urban traffic. At least you do if you're like me.

I, too, like the ride of tires that are larger than standard, so I run 32s all around now.