I was in a similar situation two years ago. I was looking for a single-handed catamaran, and the last boat I owned was a Nacra 5.7 (a very simple boat) about ten years ago. I bought an Inter-17R (the class insignia on my newest sail indicates it is now an F-17). I am still very very happy with the boat. I was initially intimidated by the technical nature of the boat, but trying to figure it out has become most of the fun. In retrospect, I am so glad that I did not settle for a boat with less potential. (P.S. - I weigh 160 lb and I can't right my I-17R without the *big* waterbag.)

Geoff
Atlanta, GA