Like you, I also used a variety of leather belts on duty and off duty for over 20 years. I was trying to find the best belt. I went from regular leather to Sharkskin to elephant skin and then to nylon. Then I discovered the 5.11 Apex Gunner's Belt about 5 years ago. It is made of TPU coated B10 that is like a rubberized material that is extremely strong, thin, and light weight. It beats any other belt that I have ever tried and worn for years. These are about $60 and only 1.5," so I don't know if they will fit your gear since you wanted a larger belt. I have worn mine for 5 years and it still looks like new, which I cannot say for any of my leather, shark, or elephant belts. It also looks good enough that I will wear it with my suits and sport coats. My EDC (on my belt) is a full size 1911 all steel pistol, 3 magazines, a flashlight, and Key Bak key chain set. The belt easily supports this gear. But, that's not all. I carry an extra two magazines in my pants cargo pocket, large cell phone in other cargo pocket, and two folding knives in knife pockets, as well as a wallet. I have a box full of conventional belts. This is the only belt I will wear and will probably last me the rest of my life. Check it out.
http://www.lapolicegear.com/511-59492-apex-belt.html