"WHAT" is or is not a good quality sail needs some more definition. ...
Then are you world cruising? does not sound like it, but if you were, Carol hasse in port townsend washington seems to make one of the better cruising dacron sails around, but you WILL pay for it. If you want a laminate style cross cut, even she admits, North or equal will be as good or better than hers for less cost!
more than one way to look at it.
Looking at Chesapeake Bay cruising for now, rather than live aboard.
With that said, if North makes good sails at a reasonable price point, are there others?