I agree with Uncle Rob on the dive belt available at most dive shops. I had the Surfcaster belt for a while with the plastic buckle but found it poppin open at bad times (prolly b/c I'm fat too). Fisherman's Supply in Pt. Pleasant has the entire dive belt with a stainless steel buckle (for around $14) that I have had zero problem with, never opens, holds all accesories. Once locked will never open unexpectedly.
The photo doesn't give you a good look at the buckle but it is the best I have available.
If you go Uncle Mikes make sure you get the heavy duty version as they make light duty belts...
BlackHawk makes them heavy duty... love their stuff...
I wore the Uncle Mikes leather belt so i can't comment on their webbed belts... I used to wear the Uncle Mikes sidekick for my 1911 which was made from webbed nylon and that was as tough as leather without being aggressive on clothing..