I've got a RKII and am lucky to have the luxury of having the choices. Speaking of the cabs making a difference, my RKII is a combo and I have a 2x12 cab which I haven't even used! If I may pitch a question to anyone who could help: Will I get a good balanced sound close to a 4x12 because the combo is open back and the 2x12 is most likely tighter and/or punchier?