Right now I own an sm400 and a goliath senior. Im very happy with the over all sound, but need more volume and more low end, however, I need at least as much punch as I have now. I play in a technical metal band, and in our style theres really not a whole lot of breathing room between a good tone and abysmal tone. My question is if anyone has heard a 'henry the 8x8' or a 'big bertha' (2x15). I want to use a henry for my upper mids/high and a big bertha for the low mids/lows. Any comments about this combinaion are welcome. Also, Ive considered an 8x10, but theyre just too hard to move. should that combination work, or would i be better suited with something else?