I shouldn't really give you any view on the r/c 585, as I have only owned mine since january, and she still has not been on the water apart from the obligatory test drive before purchase. I suggest you visit Jools' website, as he has a 2002 r/c 585 with which i believe he is very satisfied. For what it's worth, since experience this season may prove me completely wrong, here are my reasons for choosing r/c:
1.More than 500 5.85m hulls in use - many with professional users - there cannot be much wrong with them. Also, they are out there second hand in all sorts of seat / console layouts and if you are patient the right one will crop up eventually
2.Good size for family boating
3. Styling is a good compromise between UK 'utility' RIB and continental 'leisure' RIB
4. Renowned sea-keeping abilities of Deep V hull - Altho' i hope not to spend too much time frightening the kids in a F7, I want to feel that we could get home safe if we got caught out.
5. Very comfortable ride for length of boat - see comments ref hull - in various test drives there was nothing to compare for ride comfort at this length. Some while ago I spoke to a guy selling a nearly new Yam 550 rib with 50hp - when i asked why he had only been out in it twice, he was honest enough to admit that his wife couldn't tolerate the slamming in a sea-way
6. Reputation for build quality - see cost of building a RIB thread
7. Good cruising range with u/d tanks and 4 stroke engine
8. Not too heavy for 1 man and his missus launch / recovery routine
As i said, all this theory will be put to the test in the coming weeks, and i could yet end up in the same position as the chap with the Yam 550!!