I just picked up a nice pair of Genz Benz cabinets. A 2x10 XB Extended Range,and a GB 115B single 15. Both are 8 ohm cabinets rated at 250 watts for the 2x10,and 300 watts for the single 15. I want to use a Genz Benz head and was looking at the Shuttle 3.0. My question is,will this head be able to power these for small venues,or should I go to the 6.0?