2003 Caldera Geneva Utopia owner here. The Tahitian is similar to the Geneva,except the Geneva has a lounger.
We love our tub! Other than the sun fading of the cover,it looks as good as the day it was delivered.
It has been virtually trouble free. 3 months after purchase,we had a "spaglo" issue. The inside light was outta synch with the outside lights,and the main button controller was hot to the touch. It turned out to be a "heatsink" issue. We called our dealer,and within 3 weeks,they took out the defective heatsink,and replaced it with an updated version.
I would verify with your dealer,if you do go with the Caldera,ask him/her if the heatsink under the controller,has been fixed/replaced with an updated version. Mind you,mine's an 03 model,so it might have been rectified by now.
We paid 7295.00 in march of 03. The price you have been quoted sounds good! The 06's selling currently in our town sell for a list price of 8900 bucks(I'm sure there's a little room to negotiate)
If your dealer knows/understands your committed to buying his product......see if he/she will throw in a freebie/s I.E. .. Chemicals,extra filter etc etc. I personally would go after an extra filter as,they go for 65-70 bucks in my area. Plus,havin an extra filter is almost a must! Every 2 weeks I swap mine out,and soak the dirty 1 for a few days,wash/clean it,then I let it completely dry. After it's dry,I use a shop-vac to get anything out from the nook n crannies of the pleats.
Let us know what you ultimately decide upon,and,if you can,WET-TEST!
GL