Personally, I think you already have the ideal boat for fishing the Strait of Juan de Fuca and the West side of Vancouver Island. "Ideal" is a combination of many factors - cost, trailerability, cost to operate, range, speed etc. Speed does matter if you want to get out to a certain area and back in at a reasonable time or just want to move to another fishing spot at something other than 8-9kts. Sure the pro trawlers do just fine but they stay out for a long time, fish with more efficient techniques (many hooks), really know the areas they are fishing and communicate well between boats. Recreational guys don't want to spend 18-36 hours on the water (or more), often don't have the info that the commercial guys do and don't really NEED to fish in crappy weather since their income doesn't depend on it.
Regardless of what size boat you have, once the weather turns, it's simply not fun to fish. The only real motivation for having a large boat for recreational fishing is that you really need to get far offshore to target the species of interest and hence are highly likely to get caught in terrible weather in which the large boat is required for a safe return. In the strait and in the ocean off the coast of WA or Vancouver Island, most of the fishing is done within 8 miles of shore and very little recreational fishing is done more than 30 miles offshore. In a TomCat, that means you have a less than 1 hour return trip in nearly all cases in nearly all reasonable conditions. Yes, I suppose it possible that you might decide to go out on a day when the waves are >3' and have to return at a low speed like 10-15kts when/if the waves kick up higher. However, if you use your head, and the internet/radio for up-to-date weather predictions, AND most importantly don't ignore changing conditions just to put another fish or two in the boat, you'll not wind up in conditions where you need any more boat than you already have.
Nonetheless if you do decide to 'trade-up' (my quotes since I don't think it would be a trade up), give me a call and let me make an offer on the TC255. It's definitely a better fishing platform for what I do than the CD22 that I have and I've taken that 30 miles off the coast on a few occasions.