You said lake boat.... what is the water depth like? If shallow, this will rule out some great, optimal light air boats like A-class/A-cat boats because they need dagger boards and don't normally have rudders that kickup automatically.

If you have the water depth and the skill, there are almost no other catamarans that are really fun in 5-10 knots of wind other than an A-cat of any age. On the opposite side, an H14 is completely indestructible but for me is completely frustrating due to difficult slower speed manuverability in winds less than 18 knots. Prindles, Waves and Nacras of the smaller sizes are probably good compromises.