Premium economy suggestions or tips

We are cruising Sydney to Auckland in December and are originating from Minneapolis. Due to the distance we prefer to fly premium economy if we feel the value is there. Although we are Delta Skymile members we don't want to fly Delta due to the not so good reviews of their premium economy seats and don't have near enough miles for Business class.

We are considering Air NZ because we love their premium economy concept. Does anyone have experience on other airlines, aside from Air NZ, that has great premium seats? I have read many threads on CC about premium economy but most seem a bit out of date so I was hoping for more recent info.

We are considering using Delta miles from MSP to LAX or SFO and the reverse but flying Air NZ or another airline from LAX/SFOto SYD/AKL to LAX/SFO. Does anyone have any suggestions, tips or input as to an airline for comfy seats or maybe some tips for finding a decent price on great seats for the long haul? We have flown MSP to VCE in Delta coach before but prefer to upgrade for this trip.

Thanks so much in advance!

So sorry, I meant to post this on the air message board on CC. I am unable to delete from this board. Sorry-

Qantas. QF. fly from USA to Australia with a great Premium Economy section in both 747. and A 380 aircraft. QF fly out of New York,LosAngeles and Dallas Fort Worth direct to Australia.

Air New Zealand NZ fly to Australia via Auckland from Los Angeles or San Francisco daily from both cities. NZ has good Premium Economy cabin too.

We flew Cathay Pacific premium economy from the UK to Australia and back last year and thought it was very good.