A Speedmaster was my first (and second) bike. Besides the first one getting totaled (not my fault, totally unavoidable,) I did have a couple of semi-slow-motion drops doing u-turns. Just scratched the exhaust a wee bit and scratched my pride. Also just got back from my first road trip (2000 miles there and back,) a couple weeks ago.
Long story short, I would DEFINITELY recommend the Triumph SM/BA as a first bike!