I think if someone from NZ made some serious noise about a second club it would be the best expansion option. Brisbane/Ipswich just doesn't know what the f*ck it's doing, Perth will need considerable long term patience, and has already shafted the code once. CC is the best current option by a zillion miles yet for expansion's sake fails compared to NZ.
I reckon a second NZ side should model itself on the Wests Tigers. 6 home games at Christchurch, 6 at Wellington, and one rotating between Waikato and Rotorua, maybe Dunedin. This would maximise crowds.
I reference these thoughts on the Dogs game in Christchurch that drew a good crowd in sh*t weather, the good crowds Parra have drawn at Waikato v NZ, and the fact that this bid would offer our only chance to get at team in a colder climate - increasing the variation in playing conditions to include English conditions rather than another Aussie hard, fast,dry track. Variations in conditions mean variations in performances - advantage for those that like cooler conditions. Minor consideration, but anything that adds variety to the comp is a good thing.
NZ brings ample juniors and a great marketing base. I think in the race to make the NRL 'national', NZ provides by far a greater opportunity to achieve that. And given the success of the national team, It deserves more than just the erratic Warriors.