Nacra 5.8 does not seem to be as tough of a boat, my guess is that one for the same price as a G-CAT or Nacra 5.7 is probably going to in very rough shape. Plus, I like the idea of not having to worry about daggerboards with the 5.7s.

I have seen on the US SAILING inactive multihull portsmouth ratings that there was a G-FORCE 18, is this just a G-CAT5.7 with a square top, taller mast, or spin? The boat is listed as a DPN65 which would probably mean its cabable of being as fast or faster than a Nacra 5.8.