I think the S4 also will be a good phone, with an 3100 mah battery an couple of other goodies.
But I really like windows phone to, the menus and tiles and everything, but it's a shame they just cant include normale things like setting the sms sound, notification center, maybe a led notification light, a good working calendar, THE CALENDAR ON THIS PHONE IS SO BAD THAT MY OLD NOKIA 3300 had a better one, and tiles that are working etc etc etc...