First post. I'm pleased to learn that there are so many Klipsch fans out there.
In '92 I purchased a pair of Quartets (still used as my mains in HT setup), an NAD Monitor Series 1600 tuner/preamp and NAD Monitor Series 2400 amp. I felt this was a great sounding package. I retired the preamp when I switched to an AV receiver, and I took a noticable hit in sound quality for 2-channel stereo. Been thinking about setting it back up to hear what I've been missing for the last 5 years.
But to comment on your question, I agree with others who say they are a good match.