I prefer tri's for cruising. With any cat under 40 ft the room in the floats is not really much use and the bridgedeck is too low.
I have designed and built a 40 ft aluminium tri (look up beaus' boat on this
multihull forum)
Mine is a
motor sailor, with the sailing bit only with the
wind behind.
Designed for cruising and not
racing I believe a tri has more useable space, I have even gone double decker with mine.
I have outrigger floats that fold in like the Dragonfly so I can use
Monohull berths. I can also fit the boat inside a 40 ft
shipping container and ship it to cruising spots around the world.
I put two 30 hp
honda outboards on the back and I can
cruise at 8 knots with a top speed of 10 knots. However the fast
displacement design could easily take two 60 hp outboards. I am expecting to achieve 15 knots.