I Also agree with big z, I think what you are looking for is width change rather than huge volume ,when i was 100 kgs i use to ride the 8,10 flow with 130 litres ,it was a wide board from nose to tail and i did have difficult turning it at times ,I'm now 93 kgs and my 9,1 acid seems big for me now ,I would say the 9,1 placid would be big enough for you if you feel you need the volume and width ,creek found it a little big for him at 104 kgs ,
the flows how ever do paddle a little faster ,have you though of a large speed ...you will have the nose width to give you the stability and will still keep a medium width ..for the speed you seek .I know what you mean by going too small and having to sit near the surfers ,if i ride my 7,6 raptor hover ..i would have to sit with them ,but on my 8,7 placid i am out the back picking off the big ones ,and on my 9,1 acid I am way out the back ..I'm guessing you sold the 10, to go smaller ..maybe a 9,4 creek would be a good choice too ...in going narrower you will get a faster board and the buzz you seek ,34 is really wide and they do feel like whoppers ...
if its really tinny i just am on my 9,11 140 litre insane ,it is 29,5 wide how ever and does challenger me ...but the speed it has over rides all doubts that narrower board have more speed .chosing a board is tough ...thats why we all have so many ,.


don't worry what everyone else is riding ,its what you fell comfortable on and catching waves that counts ,
if you've been SUPing for a while you would of developed extra skill ...and a 135-145 litre 9,0 -9,5 should be in your ball game