Whats the general opinion of these? I have a new GK 400RB IV that Im running through an Ampeg B115 cab at 8 ohms. It sounds grrreeeat at home at low volume, but I just gigged with my old blues band, and it farts out pretty bad. Im thinking of picking up the GK backline BLX210 and the BLX115. Both are rated at 8 ohms, that would get me down to a 4 ohm load getting the most out of the 400RB IV, plus moving a bit more air. Would this be a good way to go? Or, would I be better off picking up say,,,, a single Avatar 212 or 410, rated at 4 ohms?