Centre...and I would offload Sivo, Simonsson, Opacic, Perham, Dunster, Loisou, Naiduki and Cini to make it happen if it is what it would take to do it. None of those players will be as good as the ones I have in my backline below. Sivo is unknown coming back from injury, Is slow and will probably only be worth having for another couple of years at best. Simonsson is a good winger, but will never be anything more then a solid 1st grader and Opacic is a very good defensive centre but offers very little from an attacking perspective. As for the other 5 I don't think any of them will be anything special overall.
The backline I have chosen is is dynamic powerful, fast and has X factor written all over it. If we did need to get rid of a few of the guys I listed above to make it happen I think it would be well worth it and we could fill the vacant spots with new hopefuls at absolute minimum wage. Sure some of the guys I have in the list to go are probably on minimum wage already, so cool, we keep them if we think they can do a job if injuries demand it. But in an ideal world I would keep Simonsson and Opacic for cover if we can. The rest can all go. Sometimes you just need to be ruthless to rejig your roster to get the top players to your club. Next year seems likely to be a mini rebuild year anyway, so it is the perfect time to clear the decks and bring in a player that has Jarryd Hayne X factor written all over him.
My backline would be -
Gutho
Blake
Penisini
Pryce
Russell
Brown
Moses
and hope and prey we have minimum injuries.