I have been using a RRD Twinfin 82 since late August which is a great board. Keeps speed on the wave really well and can be turned really tightly without stalling or tripping. But haven't sailed other Twinsers. The 82 has been tested against other Twinsers by Boardseeker, see their website, and came out as best in test and has also been tested by UK Windsurf magazine too (September or Oct edition). UK Boards tested a 74 and said it was the easiest and accessible of the Twinfins. General concensus seems to be that you get more advantage from Twinsers in the bigger sizes as it makes the board as manoverable as a smaller single fin board but perhaps there is less advantage for smaller boards as these are pretty manoverable anyway.

sorry, no demos for you and at $2600, i think you better start thinking about providing for your wife and child instead!!!