Ever since I've switched to the reinforced nylon style EDC belts with the cobra buckles, I'll never go back to a leather belt. Much more rigid and durable.
The 1.5" rigid Cobra duty belt and 1.5" rigid EDC belt with the 1" cobra buckles from SOE are probably the best examples of these type of belts. Ares makes a great version too, but don't like the style of cobra buckles they use. I also have versions made from Vagabond Stitching and they get the thumbs up, as well. Their stitching is different and their webbing is stiff enough. The SOE webbing is slightly stiffer and I like their stitching better.
I also have the 1.75" EDC Cobra belt from Boxer tactical. For casual IWB carry, these are extremely comfortable. Flexible, yet stiff and holds the firearm in tightly. I wouldn't use it for hanging OWB duty gear, though. I would prefer something much stiffer if carrying OWB with multiple mags with dump pouches, ect.