Get Routed is really only a good option if you are shipping out of Christchurch I think. For us, even ignoring any costs to get the bikes to Chch, it was cheaper flying out of Auckland, but we did save a few $ by having 2 bikes in one crate. Then again, Get Routed probably wouldn't have lost our Carnets...
I would take the Green freight quote with caution, when I called them up last year I was told that the guy who used to organise the bike shipping had left - I think he was the reason why Greenfreight has a good rep for shipping bikes. The man I spoke to was a bit vague about what extra charges might be involved on top of the quote, so I went with Go Logistics who seemed to have a far more definite idea of the total cost, there were no surprises with their final bill.