If you are used to E+ (even on the 747) QF's Y seating will feel tight if you ask me.......
I'm used to NZ's (34") pitch and that's my view.... YMMV of course!
P.S. Just to mention options....
You can fly LAX-AKL-SYD vv on NZ departing 11 Aug (I punched in 24 Aug as the return just to test prices) for USD $702 per person.. and that's on the 747 both ways (which is better than the 777 in Y IMO!)...
That would of course as a *Gold give you access to the NZ lounges throughout....