Can't help you much, Ravi. I've never heard the M80s, although I suspect they sound a lot like my M60s. I doubt you'd be disappointed in the M80 package, if that price fits your budget better than the Rockets.
The consensus seems to be that the Rocket 550s and 850s are more forward than the 750s, and thus are closer to the Axiom line. However, I suspect the M80s would be a bit more forward than either of those speakers. I've not heard the RS1Ks, but having a powered woofer, they are a whole different animal.
If you lean toward the M80s, you could order a pair, and if you didn't care for the "Axiom sound," you can return them within the 30 day trial period. You would have to pay return shipping, but only on two speakers, and only to Buffalo, NY. It would probably be under $100, but that's only a guess. That would be well worth it to hear the speakers in YOUR room, and with YOUR equipment. If you liked the M80s, then you could go ahead and order a VP150 and the QS8s.
