I have a 3.6 Metre Seasport Deluxe. I have had this boat since June of this Year and had 23 Hours sailing in it so far.
I concur that it has what they call a medium V Hull.
My impressions of this, bearing in mind that I have only owned SIBs prior to this is the following :-
When I first started taking the boat on the Solent from Langstone and Chichester I used to find it hard work and I got very wet. My lack of knowledge of the sea in this area combined with the small size of the boat made me very wary of going anywhere.
Now having gained some experience I have now had three trips to the IOW on my own and even got out to the NAB Tower once. I also don't seem to get very wet now either. What I have stopped doing is sailing straight head on into waves.
I must admit that I would like a Deep V Hull ( Only because the bigger boats Have one so it must be the best shape ) but overall what I would really like is a larger boat. Medium or Deep V Hull I wouldn't mind. But the overall consideration when I bought the boat was that it should fit in my garage. Which of course it does.
Having learned that my boat has some limitations I now stick within them.
What this boat does do is plane very quickly (it is a heavy boat for such a small boat ).
What you have to work out for yourself if the boat is the right one for you at the right price.
Like everyone else I dream of the next boat I will buy. Of course it will be better, because I have learnt a lot already with this one and it will cost a lot more.
Maybe some other people on this Forum may be able to give you some help with a definitive answer, I'm sorry I can't Gadge but what I will say is I still intend to use this boat during the winter, I'll just make sure it isn't too rough.
Best of luck with your choice.