This thread might have some leads for info regarding the Mason 33:
I've been aboard the Cabo Rico 34. For a Crealock design, it is fairly roomy given its L.O.A. I thought the fit and finish was fairly high quality. They never built them in high volume, so they're a bit hard to come by on the used market. They were later stretched to 36' by adding 2' at the stern. This stretch gave some nice additional locker storage aft of the cockpit. [But don't confuse this 36' stretched version (of the 34) with the earlier CR Tiburon 36', which itself was later stretched to become the CR 38.]
If you are looking at this style/type of boat, I would compare it with the Crealock designed Pacific Seacraft 34, even if simply as a data point.