MMG's have a very small "sweet spot" and require exact placement like 1/8" to get even that and you must be sitting as well.A BAD choice for room filling , long wall is OK .
They also are VERY inefficient and need a good 400 watts a side @4 ohms to be at their best.
They will sooner, or later, blow most amps not rated 2 Ohm stable as well. Been there, done that.
A fine speaker for what you want is Gallo CL-3 which Underwood Wally is selling for $999 on here now .I bought a pair of these and they are everything Wally claims them to be. A very good speaker not just for the money, but good period.
Ideal would be an Ohm 1000 but that will run you 2k.