Daniel,

Getting a mainsail that is cut for your weight and/or a carbon mast are the items that are important.
> mainsail specially cut not to have too much power to fast
> carbon mast > safety to right the boat in all conditions (a waterbag might help in almost all conditions too and if ofcourse cheaper, however with the carbon stick you're 100% sure to right it at all times).

With the new carbon masts Matt is making now the special cut mainsail becomes less critical too as you can really trim the sail flat with cunningham and in very windy conditions some additional diamond wire tension. The advantage is it keeps the sail fully fitted for 2 up sailing too.

I think the added volume on for example the Falcon, compared to the Taipan or Blade is not a must for single handed sailing, but definately adds additional comfort as you are a bit higher out of the water (especially if you sail in areas where you can get some waves).

Gill