If the bank approves the loan for buying from crutchfield...

Just bought everything for my new system. Saved over $500 by *not* using crutchfield. The free install gear ($35 VALUE!!!!!) and generic print outs aren't worth $500.

OP: The interface module is just to keep chimes, etc. If you can live without it, you don't need it. I like to keep things in working order, so I got it.