I had the BAT VK-75SE with my Khoruses. This Super amp sounded GREAT and I didn't think it could get much better. However, due to the hot tubes and little fingers in my house, I tried out the Bel Canto Evo 200.2 in monoblock configuration. Phenomenal (esp considering the price)!!!
Heard more detail than ever before. The only complaint that I have is that my system has a more laidback presentation that I like. I recently replaced my Kimber Select copper speaker cables with silver and that brought things more forward.
The Evos should be at the top of your list.