Worth Buying

I'm looking to buy my first smart watch to link with my galaxy s4 but I my be purchasing the LG G4 dependent on the specs of the nexus 2015. I am wanting the watch for fitness purposes but also to be able to read notifications from my phone when at work and any other practical uses it may have. I have read reviews of the "top 10" android watches on various sites but they all have a different watch at number one.

All advice and suggestions welcome