The best loudspeakers I have heard for drumkit is the Classic Audio Reproductions Hartsfield, a 3-way corner horn. I've heard a lot of other fine speakers (including several mentioned in this thread), but the CAR Hartsfields came the closest to getting the combination of dynamics, pitch definition, richness of timbre, and (last but not least) visceral impact of a drum kit correct. There are others that go deeper, but don't sound as natural - they don't get the tone right. Nope, I don't sell 'em.
Duke
Duke