Hi End Store In Austin Tx

I'd second the first two posts. Whetstone carries a lot of UK gear: Naim, Rega, etc. Audio Systems has Martin Logan, Magnepan, Dali, Rega, Dynaudio and a bunch of other brands I can't remember right now. There are also a few "boutique" shops that do business by appt. only.

I found this tool very useful;
http://www.stereo411.com/

Audio Systems

http://www.audiosystems.com/

Whetstone Audio