When I was looking for a upgrade from our P35, I looked into the Islander 37. They are a nice One Design sailboat and Bruce King was a very good designer and when he left Islander, he started designing for Ericson. The cockpit is large for a offshore sailboat but you still see cruisers in I37 throughout the world.
There are some good information online:
Islander 37 Sailboat Association | Information and Resources for Islander 37 Sailboat Owners and Friends
Islander Sailboats - History by Skipper Wall
There are owners on the islander37 site. Perhaps contacting some of them and getting their reviews.