Cook or Marquesas Islands?

[cruisenut2001]

We would like to hear opinions from those who have been to both places which one they think would be more enjoyable for my wife and I. We don't dive, but do snorkel. My wife's back prevents any 4x4'ing. I can sleep for days on the beach under the trees, my wife likes to sightsee and shop. We've read many recent postings and it sounds like everyone had a great time everywhere, But is there a favorite cruise of the two.

Is the RSSC PG worth the extra bucks. The Class-B on the PG for one person is more than TP AA-mini-suite for two. It would have to be a very good reason to plunk down an another $6k. I've read the boards and the PG is impressive, but $6k is another Princess cruise for 2. We have been on two Princess cruises so far and the 3rd in 2 weeks. TIA.