Well, maybe no man needs more than 28 feet, but add a wife and kid and unless you want the family version of Dead Calm, you'd best have enough boat under you to sulk out of sight...
I've been working on a Spray 27 off and on for some years, but in plywood, adapted to "stitch and glue" with Roberts' blessing. I just wonder whether the hull volume is optimum for steel construction. I'd rather have more of that weight down low.