Your price range is all over the place there! If you're looking into a Black Bay GMT as an alternative to an skx013, I'm unsure why you'd go the skx route in the first place haha. I think the black bay GMT is great, but the real hot talk on the block is the Black Bay 58. Not a GMT, but it is thinner than other BBs and oh so pretty. If you must have a GMT, don't forget to consider Omega's offering and Grand Seiko's GMT stuff.