As I explained in this thread, I when my 28's recently started to wear thin, I pulled out the nearly-new 32's (an Urban Max and a Soma New Xpress) I had in my basement. I had taken them off because they felt to sluggish.

To compensate for the wider tires, I switched from a 52 to a 48-tooth chain ring. Perfect! I can pedal quickly, maintain a decent speed, and go over bumpier parts of the road.

Tire width is all about trade-offs. You have to find the balance of speed and comfort that works for you.