made the switch after purchasing the 5 last year you won't regret it, the transition was smooth and exciting I went with a Nexus 4 because I wanted the ' android experience' I looked at the GS3 and it was eh, it did feel cheap in comparison to the i5 ,the nexus is solid with one exception the camera...other than that 10/10, excited for a new nexus device with a better camera, I too own several apple products but the iPhone isn't doing it anymore
That's what a couple of friends/co-workers are telling me when they switched to the S4.
My only concern is the camera quality. The iPhone 5 appears to take better photos than the S4 from what I read. Looking out the HTC One to see photo quality given their low resolution. It's touch since I'm a hobbyist photographer so that feature is important to me.