I have a 1.5" 5 sticher and love it.
I cary my glock 30 in a sidearmor IWB. It rides great. I love how quick it is. The only modifiaction I made is to add some gaffers tape to the front of the buckle. Every time you undo it and move around it sounds like you're taking off armor :smile: I can only imagine what others in the rest room thought. The tape keeps the metal from banging arround.
I have a 1 3/4" Combat Shooter's Model. That particular model sandwiches a polyethylene insert between the layers of fabric. This makes for a very rigid and stable belt. It is a little bit of overkill IMO and the extra rigidity might bother some wearers. A 1 1/2" Instructor belt would likely be better for use with most IWB holsters. The feel of the CSM is like a stiff leather shooting belt, except it is a bit thinner. Good for use with lots of gear and heavy guns with a belt slide type holster. I have one of their zip slides for 1911s and some of their mag pouchs too. Like'em. Great gear and the company really stands their products.