I have M80s and an old 10" sub that is now where near the likes of yours and it works reasonably well with the Axioms, all be it undr powered. You should be able to get your sub to integrate reasonably well, if not perfectly, with some adjustments. You may need to set the sub up using the subs crossover as well as the receivers crossover ie. both set to 40hz, and you may need to move the sub around the room to find the best spot. Lots of people are using non Axiom subs with good results, after all the low frequencies are more felt than heard.
