Good android Phones to replace iPhone?

Hi, I recently started to get bored of my iPhone 4 so I think I'm going to get a new phone. But the phone I get has to have a good camera and run things quite fast, (preferably an android or maybe a blackberry). Also it has to be affordable ( if contract £10-£20 per month if pay as you go, up to £350

Samsung galaxy in my opinion, the blackberry doesn't have good camera FYI

Id get the att avail for a prepaid phone its a good android phone and a 5 megapixel camera.

Samsung Galaxy S III
Samsung Galaxy S II
Samsung Galaxy S

HTC ONE X

Blackberrys arent any good

Samsung galaxy s2 on amazon is £339.99 sim free

  • Why Iphone is faster than android phones? First of all, I'm NOT FANBOY! I have Galaxy s3 and my mother has Apple Iphone 4s. No matter what the hardware and the specs.her phone never EVER has delay or lags… I mean wtf? I have quad-core processor with 1gb ram. And that iphone has dual core processor… My GS3 should be twice as fast… But it isn't. Can someone please explain this to me. But in simple words, because i don't know very much about cell phones.
  • Why do most celebrities and Hollywood stars use Iphone instead of Android phones? I know some celebrities who endorse Samsung and other smartphone brands but behind the camera, they use Iphone. I know some people who are not wealthy; not even come from affluent clan, people don't earn that much but they managed to get an iphone through postpaid plan/instalment basis. They don't care if they will bury themselves into debts just to make themselves look wealthy/classy.
  • Why Android phones are slower than Iphone? I'm an Iphone 5S owner and used to have a Samsung Galaxy S3 before. For me, the iphone is the fastest and smoothest phone ever made. I have been trying out the latest android phones at shops but none can beat the iphone. Why is the mobile industry too one-sided. I want Android phones (mostly Asian companies) to be better than the iphone.
  • Switching phones on Verizon.iPhone and android? A person who is on my family plan is using their phone upgrade to get an iPhone 5. I currently have a Galaxy Nexus. When the new iPhone is activated on their number, can we then switch phones so I would have the iPhone and my original number, and they have the Nexus? Does the iPhone to android factor affect this switch.