In reply to Sl@te Head:
just to backup what others have already said.
the hero 3 "range" has
the white (similar to the hero hd but small and with wifi, no remote)
the silver (similar to the hero hd 2, but small and with wifi, no remote)
the black which is the "new" camera, it also has wifi and includes the remote
i think the 3 silver will probably do most people unless you specifically need something the black does. the 3 silver is a cracking deal at £200 as it retails for about £280 i think.
also have a look around and you can find the backbacs and other accessories from weird places like argos and sometimes at greatly reduced prices
there's a whole load of useful info over at the goprouser forums. including the recommended workflow for using your new camera
and finally...
the camera is only part of the story, you do need a reasonably modern machine to edit your videos into something worth watching and you may need to budget a few quid for some software (sony vegas is well thought of if you want low priced but powerfull)
enjoy