Aftermarket sound system with oem HU

Getting to do a custom install in the LTZ. I already have the following

2 SoundSolution Icon 10D1 Subs
2 Diamond Audio S600S Component
1 Arc Audio KS300.4 for the Comps
1 IA 20.1 for the Subs
GM Lockpick for the DVD


What else do I need to get to use with the Bose/Nav for best sounds.

Thanks for your help.

You will need to get a premium sound line converter...in your case running a sub amp and mid amp, you will a 4ch and a 2ch... www.peripheralelectronics.com has everything u need. SVEN4 and an SVEN2.....plus your wiring kit and RCAs.