The best belt you can get is a Galco. Get the inch and a quarter dress belt. It will fit your regular dress pants as well as the holster. Don't bother with the "pre-fit" belt. Wear the regular one and it will conform to your waist within a few weeks.

Here is the link to Galco's website, but shop around and get a better price. Just google Galco gun belt and you'll find some "Cop Shops" that will have the belts for a good deal less.

http://www.usgalco.com/HolsterP2.asp
I bought a belt from this site:
Galco Belts - Galco Gun Belts - Galco pistol Belts - FREE UPS

These belts are reinforced and will hold the load of the gun well.

"Front sight, press..."