Many thanks for your helpful replies.
Kmclarke - I will definately retain your details and contact you when we definately know what we are doing. It would be great to catch up with you at some stage as my son always loves meeting new kids. Don't worry too much about the language difficulty - I find a bottle of rum can solve all that !!
Cruising Dad - Did you mean anything over 6 feet draft is impossible ?? We are actually looking at buying a Catalina 400 and I noticed that you are the Tech Editor. How have you found your 400 ?? Do you think there is anything I should pay particular attention to when I'm looking at second hand 400s ??