You might consider something like a 235/70/16 front and 245/65/17 on the rear. Those are approximatly 29" diameter and will keep within the widths to keep from rubbing in the rear.
I did some checking, those sizes are availible from Michelin in the Cross Terrain tire. It's an SUV type tire, not really agressive on the tread pattern. They're designed for a quite ride on modern suvs. Those will give the look without sacrificing ride quality, and they still have a decent load range if you need to haul some thing.
