You will finally be able to hear what the M80 is capable of; more so if you have v4. Just be careful because the 1500 can melt your M80s. Not the M100 though. I tried.
It can also vaporize your 180. Poof!
And liquify your cochlea. Bubbly goo!
And if you have a martial arts staff mounted in your living room, it will fall. Go bang!
House of the Rising Sone Out in the mid or far field Dedicated mid-woofers are over-rated