Help me out ... The final switch from iOS to Android?

Hey,

I just bought a Samsung Galaxy S4 and try it out right now, but I don't wether I switch from my iPhone 5 or not!

I'm an iPhone user since the 2G. I had every model and never an other mobile phone. I just checked out some others when my friends had them.

I really love the screen & the power, but iOS specially iOS7 is gorgeous and syncs perfect with my MacBook Air. Is there any way I can keep the way of syncing and working together?

Then there are all the news Apps which are just available for iOS (Tempo & Mailbox e.g.).

What would be a kille reason to convince me finally?