Welcome Aboard, bpitt,
If you guys just want to have fun and learn to sail, why not something smaller? easier to trailer? Then, if all of you take to it, get something a larger, with more accommodation, for overnighting. Your experiences with the smaller, less expensive boat
will inform your later choices. This would be true of anything from Lasers to beach cats, depending on your preferences.
Between the two you mentioned I would go for the Grampian, because I am poorly impressed with the MacGregor quality of build, but I am also not informed about the Grampian, so my opinion here is worth very little, merely a prejudice.