Thanks for the reply.
I'm using a single receiver a this time and I won't be going to separates until I've moved into my next home.
As for bi-wiring and bi-amping you've all helped me understand that there's no benefit while I'm too cheap to upgrade and too lazy to do my own home work.
3 M80HP
2 QS8
2 QS4
ADA 1000-4
Seymour XD
7'x 12'x 21' cave
3 Paradigm subs