In my own experience, Moto X/G or Every Moto devices from 2013, Nexus series, HTC One M7/M8 won't have lag for long term usage. Or almost possibly not to have this issue.

Samsung phones on the other hand, I cant guarantee it. The skin is too heavyyyyy.

I wanted to try iphone for the first time too. But like some have said, I am currently waiting for the "s" series. It's evident actually. The first original model will have issues, since the iphone 4.

I'd look for 5S if can't wait to try iOS tho.

This post has been edited by LuffyPSP: Dec 25 2014, 12:41 PM