Definitely stick with Frederick if you decide on a new Triumph, they're service is better than the DC dealership.
I'm going to the Oct. VA (VBMC) meet, usually folks in this area post something and try to go in a group or meet there so keep your eye peeled here on the events page.
There's a neat vintage "Nostalgia Run" in Thurmont MD on 9/7 you may be interested in. Just up Rt. 15 from Frederick.
I live near Hagerstown. You would be welcome to come up here sometime and look over my bike.