We've sailed a First 375 for 20 years and loved her. She carried us safely & in relative comfort thru some nasty storms. The difference between a First & Oceanis 25 years or so ago used to be that the First was a performance or ocean racing hull
with more stringers for a stronger build. We could see the differences when we had an opportunity to be on an Oceanis which seemed to be designed with more family
comforts in mind and less sailing.
I'd consider an older boat that has been well maintained. You'd get quality most of likely couldn't afford today in a production boat--thick GRP, real teak
and plenty of it, quality joinery, strength, and class. I've seen the new Beneteaus at boat shows and wouldn't want them as they've all had to reduce the quality of their build due to Bavaria
having flooded the market with their affordable-by-all boats.