I weigh around 175 depending on the day and being old it seems to fluctuate.I seem to be right on the bubble when choosing between 66 or 67 ski.I seem to choose the 67 more and I am curious to what are the benefits for a longer ski.I have heard that a longer ski gives you more surface area and you won't tire out as fast.So ballers help me out on this issue.....Whats better for an old guy...I only open water ski at 34 to 36 mph depending on conditions