If you are considering a side trip to Easter Island (and I certainly recommend it), check the prices on the LatAm Chile site (rather than US/UK site). When we went a couple of years ago we paid about £550 for J, which was not much over the Y price on the non-Chile site. I think the J price on the UK site was about £900. You do have to be able to read a bit of Spanish, but you don't have to pretend to have a Chilean address, or indeed have a Chilean credit card.
Easter Island is amazing. I can't wait to go back and the LatAm J product was excellent - both hard and soft.