I am about to pick up an Avatar 2x12 and 2x10, and I need a good powerful head to run them individually or together. My considerations thus far are the Carbin b1500, Kustom 1200, or maybe the Ashdown Mag 600. Which of these would you most like and/or what would you rather have? I have to keep it in the $500-700 range, and for that I am very sorry, but hey its not the car its the driver right???