My bigger fear would be not just that you would need more power to these to compensate for sensitivity alone, but placed in Atmos locations, they may even compound issues by being far enough away that they will cause room correction to down-level everything else to compensate.
If Mono is offering a good return policy, it could be worth the audition. It just bites that any chance of spending $250 +shipping, possibly both way, seems a probable risk.
I could see these perhaps working in a bedroom setup. Just make certain your subs are up to the task of a high cross... even 120 seems low for these; probably need 150, 160Hz.