Help with Smartwatch selection

I've tried browsing the different brands on Amazon, but it gets exhausting analyzing all those reviews, especially when half those people are either retarded or paid to review, so I come to you, Tech Board. And sorry if this topic gets brought up too often, but didn't see much on the first two pages.

I want a good fitness tracker, but I've already got a wristwatch and I'm not going to wear two different gadgets, so I'd like something that can just replace my normal watch and add "smart" features. *FYI - I have a Galaxy Note 3, if that makes a huge difference for syncing purposes*

Here's my must-have features:
- GREAT battery life. Not decent battery life. I don't want to be charging my watch every damn day
- Good fitness tracking: steps, calories, and preferably heart rate
- Music control - If it's going to be my fitness accessory it should be able to play my music to my bluetooth earphones so I don't have to carry my phone with me while exercising
- Time and weather - I know most have this, but this rules out some of the cheaper FitBits and Jawbones
- Style - Must look decent/normal enough to also wear to work without looking like an idiot or being incredibly bulky/obtrusive

I don't really care about the texts/phone calls/notifications features. Maybe they'll prove useful, but I'm not looking to spend extra for those features alone.

So any input from people that have experience with different brands would be great. I'm also curious if smart watches are even worth it yet? Are they still buggy and gimmicky? Will there be a next-gen anytime soon that makes the current crop obsolete? TIA