That is a tough call, either option keep or go with new will be a great set up. Yes...it's tough. I'm not too worried about SQ from the Leviathan. What I'm worried about is SPL from the Kronos. I'm happy with the output of my Son of Colossus. It pushes my subs well. I'm afraid that the Kronos will not be able to push my subs well....that's why I thought of 2 Kronos for bass. I know Mr. Mantz is not much into SPL.