Hello. I have searched for this topic but haven't found any answers. Maybe you all can help me out. I have a Rumble 500 head with a 4x10 speaker cabinet (the stack, not the combo). I have continuously read that it is not a good idea to combine the 4x10 with a 1x15. What about combining the 4x10 with 2x10? I believe the head can handle it, but will it be worth it to put these together? I'm looking for more power, but another 4x10 may be too much. What do you all think?