This is very much a 'how long is a piece of string' question.
Are you looking for a boat that sails
well? if so, go for a daggerboard boat. If you're not so interested in that then mini keels are fine. Schionnings are very good designs and often the home built ones are well done--but do check them out--there are a few duds.
If you don't mind using the engines more then heavier cats are fine and they take far more load than the Schionnings, Orams or Pescotts.
The other advantage of these boats is that they are often cheaper than the production boats and frankly, you get a lot for your money
as long as you have properly and carefully checked them out--as someone says the production boats do have their issues--I hear there has been a few osmosis
issues in several of the big brands...
If I was getting another cat--I would almost definitely have outboards... They are just so much simpler, easy to maintain and a third of the cost--no hassles with folding props, anodes etc etc. My boat has been perfect for me--I had it built to lock up and then finished it off and put the rig on it--however it is not for everyone. She was not as big inside as the Seawind 1160
(for four of us she we had more than enough space) and we sailed so much better, both speed wise and upwind angle. Big is great, however as it gets bigger it gets harder to single
hand which I love doing....depends on what you want.