i think these 8" are probably great for your bedroom, or nursing home gig, like Kingfrog said for a room approx. 250SF,
BUT
i think if was to use them in my last gig which i played for 600+ people in a VERY large hall, even as monitors, these 8" would NOT suffice...i would probably blow them, and if not they would not put out the quality sound i'm used to hearing from my monitors.
just my opinion, i will continue to use my QSC 12" powered or mackie 450's for monitors, LOVE my QSC's :-)