What's better out of an iphone 5, nokia lumia 920 or a galaxy s3?

I'm considering swapping my iphone 5 for a lumia because the iphone 5's are just rubbish, and after previously having the original samsung galaxy, i'm not a fan of the galaxy's. At all.
i've been researching reviews on the phones but they are all moxed reviews.
to hear from someone who has ACTUALLY experienced all phones and knows what they are talking about would be appreciated!
don't want opinions from people who jist go on hear say!

Ip5 is the best, I have a friend who has just bought a new S3, really awful

Samsung's and androids in general suck. Nokia is better with their cheap phones, so id say go for the iphone

An iPhone 5 is an excellent phone and I would never consider chucking it away, especially as I have used a friends S3 when I lost my phone and I didn't like it too much as I thought it was too big and not too easy to use. Nokia Lumias are in general quite good phones, but I much prefer the iOS operating system myself.

The iPhone 5 is the best phone here.

Best OS, build, battery, camera & performance.
http://www.anandtech.com/show/6324/the-iphone-5-performance-preview

& yes I have used all 3 to know this.

I'd say to forget the Lumia because its no matching the other phones

Both the phones to me were awesome and a wonderful experience (i have the note 2 also). One suits to someone and other suits to someone. I have 2 videos that can tell you which phone is better than which phone and it concludes 50 reasons which phone is better and why.

(tells why S3 is better than I phone)
(tells why I phone is better than S3)

Rest all depends on you what to buy.

5 has the best hardware and far thinner and lighter then any other phone out there. Security is great too, no need for antivirus on iphones like you need to run on other phones.