Hey, offset, maybe you can add a couple sites for getting good audio equipent.
speedsound.com for a lot of high end stuff.
speakercity.com for lots of drivers, a lot of unheard of companies, but some really good drivers
madisound.com for more speakers, perfect for the DIY crowd.
Then, maybe a section of good online classifieds.
ECA, CarAduio, and SoundDomain have my favorite classifieds.