On my around town bike I use WTB Allterrainasaurus and I love them. It's a harder tire that wears well on pavement. Plus it has a round cross section and tightly spaced treadblocks so you can really corner on them. When I use them off-road I'm allways pleasantly suprised by how well I can climb on them. Cornering is a little sketchy tho... And they simply stop working if you hit any mud. Overall I'd reccomend highly.
Oh and they're the same front and back so you can swap them when the pavement starts wearing down the back one.