Here's the thing. I have a Garmin that also gets more than a week of battery life, with an always on display. It also does the fitness stuff very well. There wasn't an advantage to the Pebble angle.
I really loved the way I could control my Pebble (time steel), with just 4 buttons, so smooth.
But, ok, out of all brands, Garmin seems nicest to me and they have a payment solution as well.