Since you're so into Legacy I highly recommend getting the Dragonbuilders expansion.
Don't attempt it until you've already played through a few other expansions.
It made me appreciate Legacy a lot more so that I replayed both Legends and finished more addons.
All my love already went to The Quest and Arvale, so I didn't like Legacy much at first. But I kept reading nice things being said about and just the thought "it's a Redshift game!" brought me quite far
Anyway, The Dragonbuilders is a great expansion. Just get it now so you can play it later.
I uploaded it here: catacomber.com/index.php/forum/legacy/4162-legacy-expansions-that-are-free