RE: Carve 122 or 133 ?? Final decision
The GO 165 and Carve 122 combination would seem very good for a sailor your size (84 Kg./185 lbs.).
You could probably go evn smaller to the Carve 111 if you get plenty of wind often.
I have a question for you.
Have your ever tried your GO 165 with the footstraps all the way back and outboard?
In my expereince, until you get the footstraps all the way back and outboard you really aren't getting the full potential of your board.
Are you running a smaller than stock (54-58 cm) fin or something?
At full speed, on the GO 165, with the stock fin, I would think you would need the additional "leverage" to control the 54-58 cm fin, so if you are using the center footstrap in the back you either have never taken the board to it's full top speed, or you are putting way too much strain/pressure on your rear foot/ankle/leg to control the stock fin.
Placing the rear footstraps back and outboard should give you better early planing speed and much better speed in marginal conditions with your 9.0 m2 rig and allow you to carry a larger rig in more windspeed.
Hope this helps,