Hurray! The plans arrived, and look great.
Of course, right away I'm thinking about modifying stuff; never could resist tinkering! ;)
The optional full headroom loft detail reccommends against applying this to the whole structure. Any particular reason? I could envision this as a story and a half, with a couple dormers on the sunny side.
I expect I would increase all the joists to 2x8, and the beams to 4x10, plus increase the pier bases to 24"x24"x2", and pour 10" diameter reinforced concrete piers.
O.K., I'm ready to listen to the group wisdom!