49er

Isis - I reckon it's better for the boat to drift away than for it to invert, as the chances of entrapment are much lower and I would guess there are few single handed skiffs sailing without safety boat cover if they do drift apart.
The 5000 isn't light which is a bit of a pain (plus the lightweights have the most weight to drag cos of the leads) but with 2 people it's not too bad. I'm a little over 11 stone and I was sailing with a heavier crew the other week and we really struggled to right her again. We've now been told to try and seal up the mastas much as possible to slow the rate water gets in at, I'll let you know how that goes! The 5000s are great though

I'm not biased at all  but the 5000 is a great boat to sail and once you get it sorted it's also very rewarding I weigh about 86kgs and can right it on my own in most breezes (tho my helm who is quite a bit lighter can't )it just takes technique. Anyone interested I would say don't just try it once have a few goes the first wont give you what you expect unless you are a top sailor.It's very cheap to sail and run (unless you fall thro the main! ),and surprisingly there are quite a few still out there.Lastly enjoy them