What is the best heart rate watch / monitor on the market for tracking workouts, steps, sleep, quantitative self, etc?

I have a Fitbit for walking around and tracking sleep, and a Polar FT80 as my science lab on my wrist. The FT80 is on the fritz, and I never liked it's web/app. I was really happy with what information the polar FT80 gave me, but I am looking for something where the data is not locked up inside a proprietary system. I'm also looking for something with better features, like perhaps dual heart rate monitoring (strap gets you accuracy, without the strap is doable but less accurate) and I'm really looking for something that has a developer focus for exporting your data to other platforms.