Catalina and Hunter (and others) have water ballasted sailboats that sail much better than the Macgregor. You can also get a keel boat with shoal draft as well - but obviosly not as low as a lifting centerboard, and with some trailerability problems. These would be a better choice for anyone who wants to "sail", or learn to sail, although I'd be leaning to a keel if you're in the beginning of the learning process.
If you'd rather mount a 50 hp outboard and motor the thing, then by all means do it. We have one around here where he never even bothered to erect the mast.
C400 #74 "Good Vibrations"
C250 #688 "Running Free"