In response to alotaklipsch and JLM re: Klipsch speakers, I do think that Klipsch speakers are worth a listen in the high-efficiency category. Traditional audiophiles can say what they want to about how Klipsch caters to the mass market and how that makes them less than truly high-end. However, I own a pair of Klipsch RB-5 monitors in my speaker collection and I really enjoy it. I compare my experience with RB-5 to other fine speakers I have had such as Thiel, Epos, Omega (Super 3R and TS-2R) and think not only does RB-5 measure up to them well, but excels in some areas.
The "Reference" series from Klipsch is different breed from the rest of their line with their horn-loaded titanium tweeter, which produces mighty fine treble even when compared to ribbon and electrostatics. And all of this is done with ease, driven by my 3.5 wpc 2A3 monoblocks! In fact, the easy-going tonality of 2A3 mates well with the slightly forward sound of Klipsch for a very musical experience, IMHO.