Hi - I haven't sailed the FX-One, but I've sailed the I20 and I17R and they extremely sweet-sailing boats. Also, they are very well-engineered and have lots of little convenience features to make your life easier. I have seen a Fox, and it did not appear to be as well-engineered or as user-friendly as the I20.<br><br>Note that the Fox costs something like $1000 USD more than the I20 does, and with the I20 you get a carbon mast and spinnaker pole instead of an aluminum mast/pole on the Fox. I assume that the FX-One is similar in this regard.<br><br>Sail fast and have fun,<br>Alan Thompson<br>I20 - San Diego<br><br>P.S. If you are ever out here, let me know and maybe we can get you a test-drive on the I20.<br><br>