I applaud you for paying attention to the details. I see many complaints from folks who carry that their holsters don't fit or a certain gun isn't concealable, and they finally admit that they're carrying with a $10 belt from WalMart made in China.
Here is a source I recommend:
I have used The Beltman's gunbelts for about five years, and the quality is top-drawer. I particularly like the fact that he offers some widths others don't (I prefer the 1 1/4" bullhide) and closer hole spacing if you desire, which really comes in handy for IWB carry. There are other buckle options as well.
After several years of usage, I decided to order a spare belt from him. I had some wear on the stitching from my IWB clips, and he graciously refurbished my old belt for only the shipping charge.
I understand that CrossBreed makes a good belt, although I have no direct experience with them, although I carry their SuperTuck Deluxe holster. It's a good company, too.