m1, I don't think there is any question you would see a significant upgrade from the Energy to the Axiom/SVS combo. I use M22's, VP150, QS8's and an SVS PB1-ISD, and the system is really outstanding.
I have never heard the Take 5 system at home, but I have heard them at a store. They are good speakers, but the Axiom/SVS combo really should be at another level. The Take 5's are small satellite speakers, which would not be able to keep up with the Axioms in terms of output, midrange, bass, etc. And the SVS should definitely be a big upgrade from the Energy sub.
