One is the phone to buy, and that is Sony Experia Z. Check it out, it literally kills the competition. First of all it's full HD, 5 inch screen, it's slimmer than the S3, extremely powerfull, brilliant design, great materials used as opposed to the old plasticky Sony mobiles, exquisite camera (60fps video) and its waterproof!
I've been an iPhone user since 2007, since the first iPhone really and I went till the 4G. 4S and now 5 are a joke. Apple is loosing the game and what they'd have to do is stop cashing in and realise that nowadays the momentum can be easily lost.
I'm waiting for the Z to be released and I'm so buying. The best phone out there so far, fact.