For what it's worth I'd say a 9'10-10'. A whalebone from SDR or a board from RG designed to suit you. Based only on what I've ridden from both of them. I personally don't think you'd go wrong with the right design 10'er.
The right design will handle an overhead as well as a 1' LM, I'd still be sitting on the beach if it was a gnarly fast breaking beachy overhead though, wouldn't want to confuse ambition with capability (for me anyway).