Nacra 5.0 and Laser II. Like them both, the cat is fast and so fun, if I had to choose I would choose the cat, but on monohulls I find a mystic that I havn´t found on cats, and the Laser II is such a great one. You feel and negotiate each wave and the trapeze requires much more work. And when you get it planing, it´s unbeatable, at high speed the centerboard start to vibrate and sound. (don´t feel the same with the Laser I, though).
I occasionally sail with my father on a 38 feet Wauquiez. Different kind of experience, but I guess also contributes to the mystic I mention on monohulls