Hi ! Got the 850 and it handles well but is a bit more bumpy being a wider that the normal Tornado hull. Again it is a bit better in the following seas. I know this because I work a lot with two 950 Tornados. My friend Erik got the 990 working with tours out of Oslo bay area.
You can try to mail Erik Aarum <firstname.lastname@example.org> Do say hi from me. I know he is happy about his boat and he do get out in really bad weather.
Claus P -have a look at www.eventyrligt.com