You can't go far wrong with anything above the 5 meter. They are very tough we'll built boats with good sea keeping. One annoying point is they do kick up the spray so are a little wet.
Make sure the tubes are Hypalon as I have seen problems with the PVC tubes.
Love my 6 mtr wave rider! Search for my posts on the subject.
Kieron recently re tubed it, and after polishing the hull she looks like new again.
If you've got any questions let me know, I did a fair bit of research before I bought mine.....
