Tellason is a great value, and the fits are rough approximations of the APC NS, PS, and Rescues. Sizing is a little whack, and I haven't seen any accurate measurements posted on online retailers; in my experience, size down two from your natural waist size, and you should be fine. Took me two tries to get that right.
If you want something a little higher end, maybe Raleigh Denim or Left Field. Not much experience with the latter, but I'm always hearing and seeing good things.