The fish boards are definately the way to go. My light wind wave board used to be a 95ltr rrd cult wave but i recently changed down to an 85ltr tabou pocket wave as my light wind board and this board rocks!! planes as quick as the 95 cult, but carves soooo much better. I think you should definately give the fish boards a go, tabou has a 92ltr or the evo 92 would be my picks. One of these should give you the light wind fix you crave.
Carbon art made a custom board for a 110kg guy at my local, this board looks and goes really well, not sure how much it cost though

hope this helps you find somthing that rips