Thanks again for all who helped me in picking this tub. We have had it up and running for several days now and I have been in it every morining and once before going to bed. Even my wife has enjoyed it and commented that this is the best tub she has ever sat in(although I don't think she has been in one before except at the health club).
For anyone interested. I did not go with the 200volt wiring but opted for the dedicated 20amp circuit instead. Temperatures have been around 35 degrees at night and I have not noticed any significan drop in water temps while soaking. I think we made the right decison and saved some money as I was able to put in the 20amp circuit breaker in myself.
Happy soaking