well i gotta chime in for advantage.
been shopping there for 3 years, spent an ass load of money there.
great guys, nice to deal with, you wont have a problem there.
for anyone wondering, they carry the following stuff:
clarion, jl, diamond, memphis, eclipse, savv, code alarm, clifford, dynamat, hooker audio (wiring), jvc (headunits), katzkin leather, audiocontrol. they can also get car and truck accessories, and wheels/tires from wheelpros.