I've just come back to Apple, lost my Lumia a couple weeks ago. Considered the 6 but honestly I don't see that it offers anything that I care about in a phone. Big appeal of iPhone is (was) the small form factor, and the 5 is perfect.
I ended up buy a used 32Gb iPhone 5 for 150 quid and spending 25 quid to stick a new battery in, good as new. Can't believe I was even considering dropping silly money on a new one!