Huw
Stop!! Don't decide until you sail a Taipan 4.9.
These are a superb boat designed from the outset to be sailed 1up or 2up. They are a nice light boat - 95kg approx. cat rigged and 105kg sloop rigged. Not sure of the weight with a spinnaker.
Easy to right on your own and very, very fast boats. A real buzz to sail.
Berthos