I guess I'm resurrecting an old thread, but wanted to chime in about A&G Custom Gun Leather and their belts; I've got 3 and they hold up excellently. Stiff and robust; I wear the black one with my suits. I opted for the 7 holes due to the 3/4" spacing instead of 1", which gives me more finer adjustment. Solid folks over there.
I use 1.25" for dress pants, and 1.5" for casual/jeans.
Below: A & G Custom Gun Leather belt, 1.25", 2 layers of 6-7 ounce bull hide, ~.25" thick, round nickel buckle, floral Chicago screws, 7 oblong holes spaced .75" apart.