The SC /ARC range of boats look interesting, I followed the link to the web-site, like the look of the ARC 21, quoted weight is same as F18 ! Is this correct ?
Bill, you amaze me, in previous posts you defend heavier boats with more horsepower as the better route, yet your designs are quoted as being comparatively very light, and on the Tornado thread you argue against going with a carbon mast while many of the ARC boats are fitted with carbon masts. Maybe one day we`ll figure out which side of the fence you really sit ?
I know which route I`d go if it was between F18 & ARC 21, depends on what they cost of course, but I`d go with the ARC even if there`s no class, looks like a big enough toy to go 3 or 4 up, a long way down the coast.
Of course, the 27 looks like even more fun, but I`m digressing here.
The SC17 looks like a good boat, and has the option of upgrading the sails to squaretop main & added spinnaker. Sounds like a fun toy with potential. No offense to Hobie sailors, but I`d go with that option over Hobie 16 any day.

Cheers
Steve