waterbear,
thanks again for your reply. I'm sure the builder was considering the use of the venturi jets in the spa. I think it was his opinion that the air injection for bubblers was an introduction of cold air into a hot tub. He had mentioned the use of a booster pump for the spa. Based on your reply, it doesn't sound like an issue as long as the heater has a high btu rating. Could you define what you mean by fast recovery time on the spa?
I may start another thread to gather more information as to what options to equip the spa with. Such as bubblers, different seating heights, reclined seating, amount and locations of jets. I'm currently looking into what type of purification system to use. I'm interested in salt, but concerned with its affects on stone and concrete. I'm also reading a lot about stray voltages in salt water pools.

thanks again,