You'll hear gun belt brand names all day long, but a gun belt just has to be heavy/durable enough to not break down with continued use.
I buy Redwing brand (but not for the name) 1-3/4" leather belts for wear with jeans and such. They have a nice finish and cost about $30, good solid, good-looking buckles. They are made of a heavy, thick leather with double stiching on the edges that retains its shape and spreads the weight well, which are the key things to look for. You don't want the belt to go all soft on you and allow the holster to move around.
Specialty "gun belts" will often have liners or double layers and will
probably last longer, but at many times the cost (usually). I tend to buy new belts as soon as they look too "used" (clotheshorse
) so I'm not spending much more money anyway.
I usually carry IWB, which gives me a little more leeway since the gun/holster is stabilized by the pants themselves with the belt providing "squeeze" pressure to keep them and the gun up, not supporting the holster alone. But my DeSantis pancake OWB carries stable and fine as well.
Bottom line, don't be afraid to try just good, solid and less expensive (but still quality) belts while you figure out what you're looking for. THEN spend the bucks on a "gun belt" if you feel you need to.