After going through this thread I see you will be sailing the Pacific Northwest, Puget Sound. There are literally hundreds of MacGregors in this area and they are very well suited for it. That many owners can't all be wrong. Blue Water Yachts in Seattle is the biggest dealership in the area. Take a Mac out for a test sail and talk to some of the local owners before you take the advice of non-owners here. You will find the duality of the Mac very usefull here due to the strong tidal currents, the 50HP outboard really comes in handy through the passes, no waiting for slack tides with a Mac.
Oh yea, for what it is worth the Pacfic Northwest is one of the worlds premiere sailing locations and if it were not for winters it would be the worlds finest. You can count yourself very fortunate to have it as your sailing grounds.