Audio Equipment Stores:

Sweetwater.com

zZounds.com

MusiciansFriend.com

SamAsh.com

GuitarCenter.com

BSWUSA.com

Audio Software Sites:

Ableton Live Software

Propellerhead Reason Software and more

Steinberg Programs (Cubase, Wave Lab, Nuendo)

Waves programs and plug-ins

Audio Hardware Sites:

Digidesign

E-MU

M-Audio

MOTU

RME

PreSonus

ECHO