heres my sq system in my 06 2.5s
alpine cde-117 deck with integrated sirius sat and usb stick hidden in console. also garmin nuvi gps custom mounted above the deck
Type -R 6.5" components in front doors and a pillars (cross overs hidden under dash)
Type -R 6.5" coaxials in the rear doors (still trying to locate oem bose door panels for rear doors)
Type -R 6x9" coaxials in rear deck
10" Type -R sub woofer in type 2 Q-logic ported box
Alpine V-power MRP-F300 4 channel amps and Alpine V-power MRP-F500 mono block
custom blow through port behind arm rest (still have to upholster it)
misc stuff 4gauge main power wire to distribution block with 8 gauge power to each amp and grounds. 16 gauge speaker wire ran to each speaker not just to the oem harness.
oh and my unrelated flip key conversion