I don't think playing Oxford or Hemel will be worthwhile. Yes, it would be nice to develop a relationship with Oxford seeing as they're a brand new club (I believe the club has links with Hemel seeing as Sarginson and Dixon are from Hemel) but I don't think it would be a worthy opponent. Look at the annual games with Skolars, they're tight for 20 minutes at most and the last 20 is always a case of BroncQuins scoring a load of points.
I like the idea of Fev or Sheffield though. Fev isn't the nicest looking place to go and seeing how well they have competed in a league that is totally pointless, it would be a worthy test and would give Rea a good idea of where his side is. Didn't Leigh turn over the Quins the other year?
Also, Melbourne are back in town next year for the World Challenge, get them back to The Stoop. The weather was lousy that day a few years ago but its not often I get to see my NRL side on my doorstep.