I am setting up a 75W per channel x 4 plus about a 300W subwoofer. I am considering the JL Audio Slash v3 @ 75Wx4 and the JL Audio JX500/1D for SW. That would run about $760 all-in. Then I saw the Helix "Dark Blue 5" on Subwoofersetc, rated at 75Wx4 with a 300W fifth channel for SW. That one...