You''re right, there is precious little written about cruising catamarans in general especially the Privileges. I take it you''ve been to the website www.alliaura.com for pictures of the 585. I have no hands on experience with Privileges, but I have been lusting after them for years and have in the process gained a lot of info about them, at least model-wise. I am also currently searching for info on the 585, which is how I came across your e-mail.
Older Privilege models utilized the central nacelle for accomodations, which pushed the ground tackle storage (heavy chain) forward causing more motion. You''ll notice all the latest models have moved the chain storage further back, limiting accomodations in the nose. The 585 is a large enough boat to still have accomodations in the nacelle and still have room left over forward.
Good luck searching and let me know if you find any more info on the 585.