Great posting Paul,
Your comparison is exactly what what I was hoping to see when I posted the poll about how much more would someone be willing to spend for a luxury cruise.
To be honest, most luxury pricing looks like it would be beyond my means but when you add up your sail and sign bill and add it to the cruise fare the Mainstream cruise then things look a little better.
My cousin tells me all the time, I can book 2 cruises with inside cabins compared to your 1 with an extended balcony, and it is probably true, but my big deal is quality of experience, not quantity. I prefer to have nicer accommodations and a better over all cruise experience then cruise twice as much with less, but that is just me.