Thanks everyone. I'm building a pair of A719's and then I'm going to put some fatter tires on them and put them through their paces. If I don't like them after I try them out I'll keep them and move them onto my cross bike. It's always nice to have some extra wheels around anyways because swapping wheels takes less time than fixing spokes--even though I've got roadside spoke repair down super fast now.
I have to admit, part of my wanting to build the A719's is simply because I like building wheels. :-P