I auditioned some Rocket RS150s against my Axiom 22tis. I chose those models because they were the same price. That's quite different from 750s vs. M60s of course, but I preferred the Axioms. IMHO, the Rockets lacked the "clarity" of the Axioms. Strangely I found them very similar in the highs, but I felt the Axioms were stronger in the midrange. Because of this I thought the Axioms had a superior "sound stage," and spacial quality.
But then, what do I know?
The Rockets sure were purty, though