... 6 15" subs???? What do you got for a vehicle?? I conversion van? You're gonna need like 3 cubes per sub... and if you have just a sedan, that's gonna mean stripping out all seats, doing a complete rewire, buying like 15 batterys, and a mono amp for each... you'll probably be hitting like 165 in burps though. Would NOT sound good for daily driving though. I'm assuming you were kidding, I'm just telling you what the reality of that would be.
Your amp is two ohm stable on each channel, so it might be good to wire a W0 and powerbass in parallel to each. That is if both the powerbass and the W0's are 4 ohms each.
dang, your sig is distracting.