I think if you want to cruise you can do it on a plank with a paddle. A nice semi-displacement hull is comfortable on a long haul - there's nothing better than noodling along a 8-ish knots while the galley slave makes pots of tea or coffee and sandwiches. I personally hate staring directly in front of the boat at speed, looking for deadheads; I much prefer looking at the view. However, you could be long gone in your Bertram if conditions get bad while the displacement hull will still be in the thick of it. I have a friend who cruises in a 37 point something Trojan with Crusaders and he is very happy. He noodles along at 8 to 10 knots and has no trouble enjoying himself. When he ran to Bamfield from Victoria, he did it at 18 knots and was anchored, having his second drink before the trawlers arrived.
There are some good bargains out there now, gas engines and sailboats are dime a dozen. I would think a nice Bertram (etc) with a pair of Cats would be nice, although its not really my cup of tea, as I prefer a single.
I have a confession. I went to Fisherman's Cove today to look at a (cough) Pilothouse Bayliner. I was attracted by the size (45) and the price and it was a good learning experience. It was horrible. When I pointed out that the radar arch was collapsing under its own weight and wobbled when I walked by, the broker said "they all do that." It had a 3 foot draft! I could only stand up in one of the two showers and when you lifted the hatch to "the engine room," each cylinder head was perhaps an inch below the cover. When you stood in the wheelhouse, you could only just see over the bow, you had to bend over or sit to see straight ahead. It was built as if all the machinery was installed in an empty hull, then they dropped the top half on and glued it in place. The pilothouse was finished in black, which really got my attention in this current hot weather.
Anyway, I broke the broker's heart. The difference to my mind is the (old, my only experience) GBs all come with a soul installed. The Bayliners and that ilk, those boats that have mouse fur or vinyl glued on the walls in the staterooms don't. They are meant to be tied in Prideau Haven after having gotten there as fast as plastically possible and the inhabitants either repair to their Jetskis or get immediately drunk. Therefore, as a party barge, they are probably perfect. Just not a boat. I apologize if I have offended anyone. Bertrams are better.