I listened to the PMC MB2 and IB2, and they are incredible systems, but both are well over $10K. Their sound is what I'm looking for in a speaker.Then search around for top Pro implementations, active even. Given the space restraints none of the usual "audiophile" products will fit the bill.
Of course, go used: Meyer, PMC, Adam, some JBL... Or maybe, a Klipsch (but you'll have to modd certain things). Unfortunately, a Klipschorn won't fit into yr room and it's too expensive - even used. Likewise, horns (that reproduce dynamics with ease) are large. Maybe Earl Geddes' "Summa" are a more conventional type of spkr that would do the job -- but I've only heard OF & about them.