I love my Wabi Special. At 18lbs it has all the quickness of a track bike but the relaxed road bike geometry makes it very comfortable. I actually found the process of working with Wabi — including their fitting system — to be excellent and the bike fit me like a glove out of box.
I run 28s on my Special and suspect I could squeeze in 32s but Wabi advised against it. However, the Classic takes 32s, the new Urban Classic takes up to 50s, and the Thunder and Thunder Elite also take larger tires with their cantilever brakes.
I would encourage you to look at the Urban Classic. If they had it when I bought my Special I might have sacrificed the beautiful lugs for the ability to run some fat tires. As it is, my Compass Chinook Pass tires provide a very comfortable ride.