J37 or Sabre 38MK1
We sail a J/36 which has a much nicer interior than other more stripped-out J/boats. There are upper and lower quarterberths, so your three kids could each invite a friend along and still leave you the forward cabin. A friend with a Sabre 38 got so annoyed at us passing him to leeward that he went out and got a Sabre 452. Now we pass him to windward instead. Some of the newer Tartans might provide better performance than Sabre with decent accommodations. I also hear good things about performance and accommodations on X-yachts, like the IMX38. Their sail handling setups appear well thought-out and strong. Don''t know about their pricing, however.