I repurposed my old Mission m72s as well recently. Owned from new since about 2003. I used to have the whole m72 surround setup but sold off the front and rears. In my lounge now I have a very low profile (wife friendly) 5.1 setup using Kef T series on the wall and a BK sub hidden away.
These old speakers still sound great. They've survived many a house move despite taking damage externally later touched up. I still have the speaker grills for mine somewhere but think they look better without. For a while they gathered dust in my loft as I just couldn't be doing with yet another bulky, power sapping leftover AVR or Class A/B amp in my summer house/office. Then I came across these class D small 2.0 or 2.1 amps out there. After reading a load of reviews (none are perfect) I settled on this little Loxjie A30 amp. At half volume the m72s absolutely sing more than loud enough to fill the whole shed and the garden if I open the doors, let alone near field stuff, all whilst consuming under 2 watts. Yes I mean when in use 2 watts not standby. Better than any cheap "PC speaker" setup imo.
I've been considering looking at inverting them (as in upside down) to raise the height of the tweeters nearer to my ears, but not sure if the sound field has been designed to have the woofer below the tweeter. May also get some stands. I know they are not perfect being up in a corner and not pointed in perfectly but to me they sound ace and I'm quite happy with them. I have not bunged up the rear ports as I don't run a sub with these and enjoy them dropping and booming as listen to bass heavy stuff sometimes.
The amp does bluetooth if I want, and is connected via usb to a hub/switch which is shared between laptop and desktop. Also has aux input hooked into the echo for Alexa streaming and multiroom duties.
What do you think about running them upside down and/or getting some stands to raise them slightly? Would change the mission logo to match.