Samsung Galaxy S5 or S6?

Is it worth upgrading from a S5 to a S6? I heard you cant upgrade memory like you can on the 5 and the battery is stuck in there.
 
S7 shouldn't be too far away (Late Feb - March?), might as well wait for that if you're thinking of upgrading. You'll either get a newer/better phone out of it (the S7), or you'll save a few ££ buying the S6 :smile: