Notwithstanding Porziob's standard drop-a-turd-in-the-punchbowl response, you certainly could find an amplifier more suitable to the revealing sound of the Klipschorns. As far as SS is concerned, McIntosh is an excellent option. If you search the Klipsch forums, you'll find other suggestions. The K-horns also sound terrific with many tube amps. What source are you using? With a speaker as tell-all as the Klipschorn, a good CDP is a must for when the music gets busy. Otherwise, the digititis is enough to send you running.
Updating the crossovers will help dramatically. The Crites are a replica of the original (search bcrites on the Klipsch forum), and we used them for a year or more. We then purchased the heritage crossovers from dgwescott here on Audiogon, and this was the biggest upgrade we have yet made in our system. Other mods I would recommend are re-wiring with silver, and dampening the horns. The former will clean up the highs, and give you better definition, and the latter will eliminate the shout effect of the horns.
Also, good speaker cables make a big, big difference. A thin gauge will get you a thin sound with these speakers, and although some owners will suggest the Home Depot-esque cables, I found them to smear the sound quite dramatically. Bottom line is with the Klipschorns, the music will sound only as good as the upstream equipment & cables. And with the wrong ancillary gear, these speakers will sound poor with many types of music.
Best of luck.