I considering a taller profile tire for my 03 H1 and would appreciate any input. I am most interested in the ride and sound quality. I go very little off road, or climbing.

Goodyear MT/R 40", but you would need a 2" body lift for any offroading. Good ride quality, fairly quiet. Also Toyo makes a very good tire, not too sure of their sizing.

The largest I have seen on a stock height truck with good springs is Interco 38.5" SSR.

I really liked the Parnelli Jones Dirt grip tires I had on my old truck. I had the stock size, but they make a 38-15.5 tire too. It would be a bit louder becuase of the tread and size of the lugs. Also becuase it is slightly wider, but should be tolerable.