Yes I have heard the Klipsch simply rock.
However, when I built my computer I didn't want to spend $250 on speakers so I bought the Boston Acoustics BA4800 I think. Something like that...its a four point surround sound unit(4 satellites and a subwoofer) and cost me about $170(w/ shipping). They are great speakers! I have heard that the Kilspch are probably the best bang for buck but if you want to spend a little less the Boston Acoustics are great! Very crisp and clear sound and the subwoofer can put out an insane amount of bass, and the speakers can easily get loud w/o distortion or anything. I've never heard the Kilspch so I don't know how they compare, but a review I read awhile ago at Gamespot said that the Boston's were close to the Klipsch for sound reproduction.
Anyways, I am extremely pleased with them so they get my recommendation!