Yeah, definitely Buffalo by David Bitton. By a long shot. Made the change about 7 years ago, and pretty much all I wear now, aside from a few pair of Big Stars.
At home and on weekends for casual wear, I only wear Tommy Bahama jeans. For work, I just wear basic 10 dollar junk from Wal-Mart. I deal with resin, and gel-coat, and fiberglass so I don't wear anything nice to work, lol.
Currently I own Relentless (only jeans that fits around my quads), Gap 1969 Japanese Selvedge regular fit, Samurai S0500XX 15 oz. denim, and a couple of Joe's branded jeans (not worth the money)