I switched from a double to a compact double on my Luna last fall. Switching to a triple would have had the domino effect on the brake levers, front derailleur, and all sorts of things. So I went with the compact double and I've been very pleased.

If I were to get a new touring bike, I would have to research about which way is better from a fresh start, but the compact double has been a great switch-out on the Luna.