My friend has a turbo. It's pretty nice. I'm not sure the price disparity, but I believe the g3 and s5 are a little bigger and more powerful
I am also considering the LG G3 but I heard it has average battery life and with the recent lollipop update, there is a good bit of issues.
Also, a darkhorse candidate for me is the Sony Xperia Z3v... This phone has gotten rave reviews with little recognition (advertising) but I have always heard great thing about the Sony lineup from the UK