Geez.......I'm going down memory lane here.
I ran IASCA a decade or so ago with OS Soundstream.....
Reference 500 (on the subs)
Reference 300 x 2 for fronts and mids
Reference SS10R - great subs
Reference SS6R - 2 per door
Front end varied - Reference SS5.1, MB Quart and Macrom.
Audio Control EQT's
Audio Control ESP-2
Managed to place 5th in the worlds many moons back.
Still running my Granite 180.6