A lot also depends on your size. The bigger your waist, the smaller the same belt will look. I've got a 40" waist, and I hate wearing dress belts (with pants) becuase they are usually 1" wide and look out of proportion. My casual 1.5" belt I wear with jeans looks more correct. I'd like to go even a little bigger, but they won't fit through the belt loops.

The kilt belts and buckles all seem to be 2.25" wide, but you will be hard pressed to find an alternative buckle for that width. But there are other choices such as tool belts.