Integrated Tube Amp approx. $2,500

Not sure how many hundreds you're willing to give, but I second the vote for a Cronus Magnum by Rogue Audio. 

Elekit, TU-8600S 300b Power Amp - nothing better and I see one on the "other site" actually connected to what I believe are Klipsch Cornwalls. This amp always gets incredible reviews.

Skunkie Designs Electronics did an extensive series of tear downs and reviews on both the Willsenton R8 and the Muzishare X7 over a period of months. It seems Willsenton took some of her feedback to heart and changed a few things in their circuitry to make it better as she suggested.

Here is a link to one of her videos. But note that there were other ones later where she applauded Willsenton for upgrading their design for safety.

Even so, while she liked both of these at the end of the day (after mods) she stated that well, nothing in life is free, and the quality of the transformers on tube amps means about as much as the quality of the tubes. Neither one of these is a "giant killer", but they are nice at their price points. Many people have bought them and enjoy them. 

https://youtu.be/fjGefU2qB-0

Oops - integrated, sorry, Elekit is a power amp... nevermind.

You own a pair of Klipsch speakers which tells me that you like rock. Rogue Audio Cronus Magnum would probably rock out with Ks. It’s an honest well-priced product to boot.