hi guys!

my current phone since 2008 is the durable Nokia N79. As im thinking its about time to replace this faithful phone with a new one, here is my requirements:

1) camera shutter/button [2-stage for focus and snap is welcome!]
2) juice can lasting for a day or more
3) easy one-hand operation
4) no need screen protector
5) certainly no lag issues when browsing the net / opening an app

after much considerations, i have shortlisted only two.
Sony Xperia ZR and Nokia Lumia 925.

Please enlighten me which one should i choose based upon all your ownership experience either of these two smartphones. Thank you.