Look around and see if you can find an OLD Lightspeed headset on ebay or Craigslist. Buy that and then send it into Lightspeed to participate in their Zulu upgrade program. That'll knock between $200 and $500 off the price depending on the model of the old headset. Even if you pay $100 for an old 15K model, you're still saving a good amount of cash. Big reason why Zulus are in my future instead of Bose.
http://www.lightspeedaviation.com/content.cfm/Products/Trade-Up-Program---Zulu
<EDIT> HA! Guess that'll teach me to read all the posts to the very end before I respond. Good on ya for finding the trade up program. Go for it.