YES i own one 6.3m adventurer. The black-orange one that is on their site.
Very capable Rib. I do crossings from Belgium to the UK. It is a very stable boat (bcoz the tubes are in the water), very dry also, very smooth ride. You can maintain a speed of 20knts in almost any condition. Max speed is 37 a 38 knts with all gear and full fuel tank (140l)
One advice: if you like speed, please use the max horsepower at the transom. I have the 140Suzuki, it is quiet, economical (0.52l per KM), easy to maintain. I would go for a 150HP in ANY CASE!!! Evinrude or Verado.
It is a great rib, very well manufactured, the people who are doing maintenance on the engine here in Belgium say they never saw a boat that well wired!!!!! means something I guess!!
Where is Tony T; owns the same as me....He is Brittish and can explain even more in lyric words to you:-