I rather have wallet.
Plus after the KitKat update, google wallet should work on other carriers to.
My cousin has a gs3 on AT&T and after the Kitkat update, wallet worked
i got the S5 yesterday, and i love it.
Screen is great, good camera, like the new Touchwiz(i find stock android boring)
The fingerprint scanner works everytime for me. glad i upgraded to it.
i have had my s3 since it came out, i haven't had any signal issues(the ones that i did were sprints doing, cause by NV ugrading).
Charging port still works great
read this post will tell you all about what you get as a sponsor and how to be a sponsor
http://s4gru.com/index.php?/topic/1195-information-about-s4gru-sponsorship-levels-and-how-to-become-a-sponsor/