I have 2-4ohm Cerwin Vega DX-9's and 2-8ohm Technics SB-A52's, along with several other 4-8ohm speakers (large, floor, all >150watts). I currently have a Kenwood KR-V5550 receiver + Technics SH-8055 eq. What is the best way to increase my outputs per channel? I'm considering either...