I've been checking out the SWR SM500 and 900 and ran across the Mo'Bass. Something isn't adding up. The Mo'Bass has the same wattage/ohm specs as the 900 yet it is 300 bucks cheaper......and you get killer sounding analog effects. In fact the Mo'Bass is only 300 bucks more than the 500 and you get all that extra power. What gives??? At first glance it looks like a no brainer, what am i missing?