Not to pry, but since you are looking for input, what are your cruising goals?
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I'm not an expert on CE categories -- and I'm sure they aren't perfect -- but I see
@Mambo42 mentiones Category B for the boats he linked to (at least some of them). A number of the Linssen and I think Barkas boats I have looked at (online) and drooled over are Category C.
To me even the Category C boats look as "seaworthy" as many US trawlers. What I mean is, they look like coastal boats, where you can cruise to many places if you watch your weather and cruise accordingly. I would think something like a classic Grand Banks would be Category C, and you see those cruising pretty far and wide (again, watching weather windows).
But none of the Category C (and most US trawlers) would I say you can cross an ocean in (most of us anyway). Because you can't predict the weather for the whole journey, and probaby because there is not enough fuel capacity.
I guess perhaps study the Category B and C differences a bit? Since you have the categories there to give you at least some guidance.
Perhaps Category C is fine for what you want, but OTOH maybe you will find you want to stick with Category B -- or even A (plus of course using your own judgement since I'm sure the categories aren't perfect) would more likely give you the minimum standard you are looking for? (I'm not clear on your cruising goals, so am just speaking generally.)
Okay, after blathering on, I realized, duh, why not look up the Categories. I'm sure there is MUCH more detail available, but this is the basic. Italics mine.
The further offshore the vessel is expected to venture, the higher are the expectations for construction strength, stability, freeboard, reserve buoyancy, resistance to downflooding, deck drainage and other seaworthiness criteria.
Category A Boats: Ocean
This rating covers largely self-sufficient boats designed for extended voyages with winds of over Beaufort Force 8 (over 40 knots), and significant wave heights above 13 feet, but excluding abnormal conditions such as hurricanes.
Category B Boats: Offshore
This rating includes boats operating offshore with winds to 40 knots and significant seas to 13 feet.
Category C Boats: Inshore
This rating is for boats operating in coastal waters and large bays and lakes with winds to Force 6, up to 27 knots, and significant seas 7 feet high.
Category D Boats: Inland or sheltered coastal waters
This rating is for boats in small lakes and rivers with winds to Force 4 and significant wave heights to 18 inches.