I purchased the sumit when I first bought my arcitc,however, I changed my mind and went with the tundra instead. I did not like the one corner in the sumit, but that was just me.
As for the decision between the two I would say 1600 is a lot for five extra years, but may be worth it down the road, however, with that said, I would strongly encourage you to read up on the warranty as it is very limited when they say limited warranty.
so me as an arctic owner, lets see...
I love my tub, theraputic, I dont float, I love the closed seating in the tub, I love the microban shell, never get that crap around the edges. I love the micropure disposable filters that arctic uses as my water is perfect all the time with little effort.
The jets dont last long, as I have made many replacements over the past 2 years, but apparently they have made a third or fourth brand now that are better.
The cedar skirt is very nice, but will require yearly maitenance if you want to keep it up.
Make sure you get refferals from the dealer that you buy from as I find the service to be garbage down here. I also found the sales department lied to me when I purchased my tub.
So was it the right decision, yes and no unfortunately. Great product, crap warranty poor sales and service support. To me at this point, I would keep looking and only decided on arctic if you are satisfied with a so so warranty.
Good luck from a so so satisfied arctic owner
I guess the question would be, would I buy one again, to be honest, I would more than likely research for a better warranty and customer service driven company.