Neil have you owned a 6m Glass boat before?

You are right there is nothing but a good thing pushing torque to the maximum recommended. Which is what you need to consider, not the HP but the weight and torque recommended.

Keep in mind older boats are recommended HP based on 2 stroke. Dont go thinking chucking the maximum 4 stroke on is just that without consulting the builder. In most cases it should be fine. The reality is you will be dealing with less torque on the transom, but much more weight, so the extra weight with slightly less torque is the only concern. Just consult the builder and ask, just for peace of mind.

In my experience 6m 150hp, 5.5115hp, 5m Ived owned a haines signature that did 75kph (sorry cant be bothered converting to knots) with a 75hp 2 stroke suzuki on it.

Its all about weight mostly, once you get to 6m you are starting to haul weight. Heavy glass boat and if repowered with 4 stroke extra heavy donk = New vehicle in a lot of instances.

Just stating the obvious just in case you havnt thought the basics through yet.

Otherwise a good 6m glass boat is a potential inshore, offshore on good days weapon.

Haines SF600.

Seaforce are good boats though.

Not hard to attend Coast Guard bar crossing day/course. Also pretty easy to convince a local skipper to come out with you and teahc you the bar. Just remember the time rules 2.5-3 hours going out, 2 hours max coming back in. That may change per bar. Glass boats are no diff to any other boat on a crossing. Except once out their they have the best, nice fluffy soft angelic ride lol.

I think Seaforce have the right hull shape, nice entry, fairly dee deadrise, downturned chines for stability at rest. Thats whY i would go a Haines Sports Fisher, but each to their own.

I know some spearos who love their old haines v17l which is all deadrise, know attempt at stability at rest aside from normal beam width. But the ride under way they are amazing boats.

As for size. If you can afford 6m DO IT imo. Nothing beats size. The difference between a 5.5 and a 6 is surprisingly noticeable in decent swell.

If I was limited to west coast Id consider a Deep Vee Ally pontoon of which Osprey is the only real fine entry and deadrise Im aware of The rest are good boats but designed to get you home without addressing the comfort issue, My opinion. Or you could go a 6m RIB, Light to tow and and will handle surf well. But most do not offer full cabins, I think the 6m Naiad might.