LG G4 or Z2/3 ??

I was about to get Xperia Z2, but I found this phones with its brilliant Camera :D
Is it worth buying ? Is it a major step over Xperia Z2/Z3 ?
I will get : Better CameraS + Bigger Display + Dual Sim + IR remote.
I will sacrifice Front speakers + water and dust resistance + Battery life + Better UI -in my opinion- .. Is it worth it ?
I also read some topics here that its touch lags too much !!
I am afraid of that phone lol :D your opinions are appreciated :D
Thanks a lot :))