The s3 looks nice but it's a little bigger than I like, and costly being so new. I think the s2 is perfect for me.
I've got a gear s2 last week and I like it a lot. I get about 2 days out of the battery but I don't really use it for a whole lot I just like checking my calls/texts/notifications, give quick responses, look at emails. I love that I can feel every call and text. Sometimes I would miss calls, just didn't feel the vibration in my pocket, but that doesn't happen any more. Also been a little more conscious of my walking, etc, which is good I guess.
Sucks that they're not shipping yet...Good luck.