I use my galaxy s3 pretty much only for calls anymore, and do everything else on my 2013 N7. When I'm on the go, I just tether my tablet to my phone for WiFi, if there is none around.
Our contract is up this year, and I'm leaning towards a note3, because its closer to the tablet screen size. I can't see ever going back to something smaller phone wise than my GS3.
Hope that helps!