I am about a month late with advice, but here it goes anyway.
We looked at a Mariner 41 in So. Calif. I don''t know if there is much difference between the 39 and the 41. We settled on an Island Trader 41. Same layout as the Mariner. I would say that the Mariner would have the same overall sailing characteristics as our Island Trader and we think she sails great! She is great in big swells and is very comfortable. I was 260 pounds when we bought the boat and had no "cramped" feelings anywhere in the cabin. I have since dropped 60 pounds and think the place is a palace! The mariner we looked at was wooden. Our IT is Fiberglass. Go for the fiberglass if you can find it!!!!!! So many people think our boat is wooden. It has grooves in the hull that look like wood planks. All the looks, less hassle. I originally wanted a wood boat, but am happy with the fiberglass. Besides, the masts are wood, the bowsprit, all that exterior woodwork, teak decks...there is plenty of wood to care for.
Hope this helps.