Suggestions on Integrated Amp./Seperates to Run my Klipschorns

If your Khorns are stock, I would recommend updating / replacing the crossovers. I also recommend, damping the mid horns and tweeters, using a product such as Dynamat. There are youtube videos discussing and showing how this is done. The metal bracket used to add the rear support of the mid horn, is also very resonant, when the speaker is playing. They have great potential, and most folks on the "Gon, have never heard, a modified and updated pair, which is, ime, necessary, to take them from good, to great, and, they are. I use solid state with my Lascalas, which is better for me, than tubes. A Class A amp would be my choice, and, you do not need a preamp ( the additional gain ), unless, you do want to add some color ( Dac to amp would need to match, as far as driving voltage is concerned ). I have been listening / dealing / tweaking, with Klipsch Heritage, for many years. Join the Klipsch Forum, on the Klipsch site, as people there will be friendlier and more welcoming, as well as, more capable to helping you on your Klipsch journey. Enjoy !