I'm starting to rethink this a bit. I think I'll take my time and hold out for a higher quality Duck. I've had my Aire Lynx II for as long as they've been out and it's still in terrific shape. I wouldn't be too concerned about buying a used  high quality inflatable. I do like the Aire type construction due to lighter weight, easy repair and overall stiffness. The Thrillseeker also seems to have many devotees and from what I've seen is of very high quality.

Any ideas where I might locate a previously owned Force XL or perhaps a Thrillseeker?

Miguel