I have a 2k1 AE with the integrated Bose system. I want to put in a second AMP and 2 12" subs. Want to keep the stock deck/amp/speakers and just feed to the second amp to power the subs. Any suggestions of AMPS (make and model) would be very cool. Looking for something used as well so if you got something for sale post er up. Don't need to spend big money but want a good amp to power the subs only.