Re: arriva boats
I looked at an Arriva when I was in the market to purchase a boat this year. I ended up passing mainly because the motor had a core plug pop. I think you are talking about the Arriva's around 1990, built by Bayliner or for Baliner. There is some info at the bayliner owners club forums.
I looked at a 2450, 454 bravo unit seemed like a nice boat, I liked the style and they were a pretty quick hull from reading. Parts are very hard to come by, do not break one of the curved glass panes as they are really hard to get so I have read.
Good luck