Hi All,
got an 03' Speedmaster, and I just installed the Kuryakyn Dually ISO pegs, and ISO stirrups, and they look and feel really snazzy. With the stirrups angled right, they have the same provide the same ability that boards do, to just slide your feet forward to manipulate the controls. Retaining the "simple peg" look, they fold up almost as well as stock pegs do, are more attractive than the pegs (and to my mind, the boards), and have the same comfort features.
www.mascycles.com sold me the whole shooting match with the triumph adapters for less than $150, and it took me about 20 minutes to swap out the pegs on both sides (the majority of that time was angling the pegs and stirrups to my personal quirks). So anyhoo, keep the kuryakyn stuff in mind, if you're contemplating an upgrade from the stock pegs.