Mumm/Farr 30

Pros
Fantastic design, punches well above its weight performance wise (for far fewer $$than larger designs).
Very well thought out deck layout, all systems work.
Versatile - I think it can be brought up to Cat 1 (if you're really keen).
Relatively easy to handle, no runners.
Cons
Does rely on crew weight (as with many race designs) to a large extent for righting moment.
Lack of headroom.

Another point is they don't (generally) have a prodder, so needs a bit more coordination to fly a kite, but can still fly assys (from the pole - and the system works easily), and are a weapon downwind!
Also, to get the most out of them, they need to be well and constantly (again, true of most racing designs).

As with any boat, the $$s will add up very quickly (especially as a % of purchase price) when significant equipment needs replacing.

That a great summation All@Sea.
Don, a friend has just cut the cabin off a Mumm 30 and did some really cool mods, awesome little boat, it only needs a breath of air to move it. It would be soo good in a breeze with a packed rail. The crew weight and position looked to be critical as All mentioned, and I was surprised at how little room inside (especially without a cabintop!).
The running rigging is tiny, I'd actually enjoy the trips to Whitworths for a change

Awesome boats. There is one here for sale in SA Vertigo. Good boat

Hope Mick got the trailer.

Harsh posting that one!
The bloke on the mainsheet on the Mumm will be plenty fit sailing on the Huon