I've seen all named boats (I-17, FX-one and F16) handle doublehanded crews of 350 lbs, so all we handle it without damage. Actually both the FX-one and F16 it was I who loaded them up and raced them.

As far as I know all named boats are garanteed to 180 kg = 400 lbs in Europe.

With respect to your weight and length I don't see much reason to favour one over the other. At 240 lbs yoy can right all, handle all heeling moments (mast length times sail area times wndforce) and you sure muct be a strong guy as well so you can beach handle/trailer handle them all.

All named boats have ample volume in the hulls and at your weight the FX-one will sit better in the water as well (my personal opinion). F16 and FX-one have the same size rig, with the F16 being significantly lighter. The I-17 is also heavier but compensated largely by having more sail area in the rig.

You are of the stature that you have a completely free choice of boats.

My personal preference is the F16, but I admit that I'm strongly biased to that boat type. In my opinion it is the lightest and most easily handled boat of them all. As such it comes closest to the A-cat in feel. I also feel it is the faster singlehander of them all and I really like the aspect that I'm not forced to buy every replacement part from a single supplier. At this time it also appears F16 is becoming the larger class of the 3 named boat types. And it is American build !

Wouter