I just got an Artesian Dove Canyon with lights, steps & lifter for $8900. Island should be somewhat less. At least in the Platinum class, the Artesian's remarkably quiet and the use of individual pumps for each seat makes the spa a bit more group-friendly. None of that "Hey, your lounge stole my captain's seat's pump power" wrangling.
I have an extra question for salesdvl, though. Artesian's website has a page on water care that discusses the Nature2 cartridge. Am I right in assuming that you'd put the Nature2 cartridge in the green filter for the circ pump, and not one of the other filters?