Thanks castaway, I appreciate your comments!
The Creek is for sure, a contender for Linkus, in his troubled Mediterranean sea.
No doubt that the Creek is a very fast board... but IMO, to get that speed, you need to be on a big enough Creek.
My 9'1 is stable enough for me, but I will choose my 9'4 every time.... it has the right surface area to give me lift and speed in low power conditions.
Linkus, I did the stability test between many of the boards suggested here, to make sure they would give you more stability than your 8'3 Shroom.
At your height, you can go with more length and width and still get the performance upgrade you are looking for.
In low power waves, surface area is king IMO.
An oversized performance board will give you more performance than a shorter one in your conditions.
Performance boards that do very well in low power waves:
An Acid, that has good surface area for your size.
In your case the Acid 9'4 x 31.5 at 136 liters should be the right size to give you the performance you want... and will be similar to the stability of your 8'3 Shroom... the narrower nose and tail will be a different challenge for you, but there is ample width on the 9'4 to make it reasonably stable for a 90 k rider.... but not as stable as the other board listed here. But it will give you great performance in your waves.
The Creek 9'4 x 32 will be both stable and give you great performance in low power waves.
Still one of the fastest boards I have ever ridden.... and easy to ride in most every condition.
Also, boards with less rocker give paddle power and speed on soft waves.... even in shorter sizes.
Boards like:
The Steeze is a very popular board in Florida, which has conditions similar to the Mediterranean.
9'2 x 30.5 at 137 liters is a board that would suit your waves very well.
It surfs like a fun shape... not quite longboard, and not quite shortboard.
Skate 8'10 x 32 at 141 liters is worth a look as well. Flatter rocker, wide tail, means easy to catch waves and carry speed down the line without a lot of juice. It's a very good board in softer waves... but not great in steep waves.
You asked about the Placid
I really like my 8'10, but was not wild about the 9'1 (nose felt too big)
The 8'10 is one of my favorite performance board, BUT... it needs a little power or size.
I can ride bigger soft waves with it, but in smaller soft waves, I will use something else.
As long as I have some push in the wave, the Placid is super loose and fun to surf.
It paddles in easy and has enough speed to rip on, but I wouldn't put it in league with the fastest boards.
My 8'10 Placid is definitely more stable than my 8'3 Shroom and easier to paddle
Bottom line, I agree with castaway.
I think my choice for you would be the 9'4 Creek.... it ticks all the boxes and is a proven performer.
A little less performance than the Acid... but light years more stable.
If your waves have some size and push, then the 8'10 Placid is also a great choice and will give you some added snap!
Here are the boards I compared to the 8'3 Shroom