Galco makes some great gun belts for a decent price. If I remember correctly, LAPoliceGear.com sells them for around $85 each. While it's a bit pricey for a belt, it's had the price of the custom gun belts from the top leather workers. I use a Galco for EDC and I couldn't be happier. It doesn't twist or sag under the weight of a loaded firearm and two spare mags, plus it's very comfortable.
I'm a big fan of 1 1/4" width belts as I've found anything larger than that to be a little tight in the pants' belt loops.
Basic Gun Safety by Jeff Cooper:
1) All guns are always loaded
2) Never let the muzzle cover anything you aren't willing to destroy
3) Keep your finger off the trigger until your sights are on the target
4) Be sure of your target and what is beyond it