I have looked into this a few days back, and it seems the TMobile US version is the best. But if you can wait a little longer, the LG G3 is out which on paper, is better than the S5.
3gb RAM (there is a 2gb RAM version)
Quad HD display (4x than on the S5)
3000mAh battery (user changeable)
Built -in Qi wireless receiver and NFC on the REMOVABLE battery cover (this is by default, unlike crapsung that sells the Qi/NFC enabled battery cover, which makes the phone thicker, and very difficult to find a case that fits)
No Knox to worry about.
Last edited by xdm9mm; 28th May 2014 at 04:35 PM.