I like leather gun belts better than the nylon instructor belts, but that is just me. I use A&G Custom Gun Leather
belts in the 1.25" size, because I need them to be able to fit through the belt loops on my suit and dress pants.
As far as the nylon belts, I have two Wilderness 5 Stitch Instructor belts that I use once in a while. If you want a nylon belt you should get the Wilderness Frequent Flyer belt
, because it's less tacticool looking without the huge metal buckle on the Instructor belt.
I have had a Galco leather belt, and it can't hold a candle to the A&G belts I have now. The thickness, stiffness and quality is not on the Galco like it is on the A&G.
Here are my leather belts I use.