For the OP:
I think that any naval architect would be glad to tell you that loading down ANY boat, especially a multihull
, will diminish performance... no matter what anecdotal opinions you hear to the contrary. Some will tell you that loading down a multi is also a safety
issue due to increased rig loading and so on.
So, it all depends on what level of diminution of performance you are willing to endure. Yes, as an earlier post says, a heavily loaded cat can sail "just fine" and successfully cross an ocean. But, I believe that it would undoubtedly have sailed "just even better" if less burdened. Only you can determine if that is important to you.
And from considerable experience on the East coast
of Oz, where there are lots of cruising cats these days, a great many of them do not sail all that well... even well off the wind
. I'm no expert, but when I see the factory water
line a couple of inches below the ocean's water
line, and then find that boat being a slug under sail... well, I'm not surprised!
A final word, one often echoed here on CF: if you have that many complicated systems on board a cruising boat, you will spend a lot of your time and money
dealing with them. Maintenance
alone, let alone breakdowns, will be a big effort. It may be worth it to you... again a personal issue.
I hope that you can reach a solution that suits your needs and cruising plans as well.