I just bought a new set of Zulus for $550 using the company's trade in offer. They give you about 90% of the purchase price you paid on an old set of Lightspeeds toward your purchase of the new one. I had a pair of XL15's I used for 5 years straight, a fine headset in itself, and I received 90% of my original purchase price toward some Zulus. In my opinion Bose X is overpriced by about two bills, and at this point is also bit out of date. They really need to come up with something other than the payment plan- perhaps a trade in offer or a lower price, or maybe all 3 options at the same time.