I had one 3 hour south pacific flight a few years ago and they had no entertainment. they made no announcements about anything so I don't know if it was broken or non existant or whatever.
I personally dislike having the stop over - and depending on the timing you can get cheaper fares on Qantas / V Aust / United etc or if you are willing to stop over in Auckland - Air NZ, before it would cross my mind to do a long haul flight on AP.
Hawaiian Air have been advertising specials - infact I just got an email saying $500 return to Hawaii book by tonight - and from Hawaii you might be able to pick up a cheapish LAX return airfare.