I think the Aires would be fine. It has a LOT of power, especially when the wind blows hard. Never a moments hesitation in 45 knot winds and 18' seas on a 400 mile leg to Grenada one year. I made 3 extra vanes for mine, but never needed them.
BTW, re: autopilots, check out W-H Autopilots Simple, well-engineered, very robust and very reliable. Good telephone support, too.