Payne better at outside centre? I don't follow Ulster too much so as just remember seeing him at fullback.
He doesn't necessarily have to have desires for caps to extend a contract. Could be he enjoys the club. Paul ***o was that way for Cardiff Blues.
I think he's better at full-back - he hasn't played much at outside-centre for Ulster so far - but there's not a lot of other contenders to replace O'Driscoll, while Ireland are sorta ok for full-backs.
Either way, on current form, he'll walk into the Ireland team if he so chooses.