I spent a couple of days on an Allmand 31 this summer. It was of 1979 vintage, and recently refurbished. It was a pleasant and roomy boat, with a nice cockpit layout similar to that of a powerboat of similar size. the traveler is ahead of the cockpit-- a good thing, in my humble opinion. Decent Layout down below too, with the head forward near the v-berth, and a port side entry to the aft cabin. I have heard that they don't do well in light air.
NO experience with the O'day.