I sold a spa last year at the fair, anyway he is 7'2+ he tried quite a few spas, he even wet tested at the fair which was a first for us. He first tried the Jacuzzi J-365 then went across the street from us to the Sundance dealer, we face each other. He tried their wet Optima, then he came back and test soaked our J-470. He walked away with a new J-470. Not saying this is the spa for you, but worth a look. Both the J-470 and Optima are non loungers though.
Loungers and tall people are not always a good mix, the Jacuzzi J-465 has a very long lounge may be worth a look also, if you have to have the lounge??