I agree with Gary. Definitely get the 18 and bigger like a 21SE. If you are going to sail solo you need 16 and possibly an 18. Generally with minimum 2, which is always more fun than 1, I can rig the 21SE in less than 45 minutes, with 3 it is getting down to 35 minutes. Therefore, if you are going to sail with freinds and family bigger is always better. The 18 would be better if you are always going to sail with somebody. The 20 or 21 if you are going to average 3. I have yet to find a faster boat than the 21 SE, but I am sure the tigers are faster, but with 6 adults you can mostly still outrun every boat on the lake.....

My Tornado is faster than any cat I have been on, but the 21 SE with wings with 5-6 adults is the most fun you can have in the summer.
