Thanks for your advice. One problem I've found here where I live is that there are few secondhand boats on the market (for a price I can afford!!). I have looked at a couple of Nacra 6.0's. One was in quite poor shape generally (1996 boat), the other was a lot better all round apart from a lot of twist between hulls (I have been told to avoid boats like that). I am close to buying an Inter 20, but haven't yet checked her out. There is another Nacra 6.o I could look at. Most of my sailing is on the sea, where it can get quite rough, so a lot of bouyancy up at the front is appreciated!
Cheers
Chris