There is a place in Vegas on Las Vegas Blvd (the strip) but about a mile south of the casinos (actually near the airport) called "Frys Electronics." If you have never been to a Frys, it is a pilgramage you need to make. Imagine Dixons on steroids. Lots of steroids.

Basically everything a geek needs, from headphones to laptops to solar powered remote control airplanes to well... whatever.

The other place is the Apple store in Vegas. I think they carry them, though it will be the full retail price

http://www.apple.com/retail/fashionshow/

Other than that, I'm not sure. Probably would have to check the Bose website. Best Buy / Circuity City of course, but not sure if they stock something "high end" like that. There may even be a place in the Vegas airport.