I'm not a dealer, but I have to say, personally I think $8600 seems a bit high to me for a 350 gallon-6 person, (looks more like 5 to me, or in reality I'd say 4 adults) 1 pump (not counting circ) tub.
Don't get me wrong. HS is recognized as a top of the line brand, but folks here have reported getting the Grandee for that price.
Is that price after tax?
I hope it includes delivery, steps cover a cover lifter . (o3 is standard).
Perhaps I am completely wrong, but I'd shop around. I think you could do better. What were they asking for the Vanguard or Envoy? Have you shopped other tub brands?
It doesn't hurt to look around and see what all your options are before droping some serious change.
for folks unfamilliar with the Sovereign:
Sovereign Specifications
Seating Capacity 6 adults
Dimensions 6' 8" x 7' 9" x 33"H/2.03m x 2.36m x .84m H
Water Capacity 355 gallons/1,344 litres
Weight 713 lbs./322 kg dry; 4,603 lbs./2,088 kg filled*
Light (Extra Large) Luminescence multi-color LED lighting system
Jets (Total jets-23)
(Stainless Steel Escutcheons)
1 Moto-Massage Jet, 2 Soothing Seven Jets,
2 JetStream Jets, 2 Rotary Hydromassage Jets,
2 Directional Hydromassage Jets,
14 Directional Precision Jets
Water Feature SoothingStream
Control System IQ 2020 230v/50amp, 60 Hz
Heater No-Fault, 6000w/230v
Jet Pump Wavemaster 9000; 2.5 HP Continuous Duty,
4.8 HP Breakdown Torque
Circulation Pump SilentFlo 5000
Ozone System FreshWater III Corona Discharge
Effective Filtration Area 120 sq. ft., top loading, 100% no-bypass filtration
Vinyl Cover 3.5" to 2.5" tapered, 2 lb. density foam core