"Significantly better" is highly subjective. If you like the sound of the M&K's better than the rbhs, then yes, it could possibly be an improvement.
On the more practical side of things, compare sensitivity of your present mains to that of the M&Ks. The old school M&K's were very low sensitivity speakers and required a ton of power to really shine, although your Emo is beefy enough I would imagine.