Replacing Futura 133

[MarcoM]

Hi,

I want to sell my Futura 133 2010 wood version and replace it for a new board. At this point I am doubting between an Ultrasonic 147 or an Isonic 137 or even a Futura 141. My weight is 98kg and length is 1.95m. I am an intermediate surfer. I also have the Futura 111 and 93 (both 2011). I want to have the board for light winds (9 - 15knts) The sails I have :
RAM 9,0 (2010)
RAM 8,5 - 7,0 - 6,3(2011)
S-type 7,8 (2009)

I like the Futura's very much, easy forgiving boards. I wonder how the Ultrasonic will be and if the Isonic will also be a good alternative.

Why sould I go for the Ultrasonic, the Isonic or even stay with the Futura?

Like to hear your opinion