Krell amplifier with Hales speakers?

Bfuehrer, you are smart to be looking for a powerfull separate amplifier for your great speakers. I agree with Kevinkwann in that a system with Hales does not have to be bright, but I wouldn't claim that Hales tweeters are not bright. They are quite correctably bright.

Also Hales are no SO hard to drive. If they were, your integrated would not still be working. They are, however, a deep well for wattage and benefit from a fairly stable amp. The impedance and phase are plotted in the archived review section of Stereophile's website.

There are not so many suitable amps in your price range that you cannot investigate most of them. One I think you should consider is the Classe CA-300. I'm not claiming its categorically the best amp for the money, but it gets along with Hales very well, without brightness. Another high power amp company that springs to mind (that I have no experience with) is McCormack.

As far as preamps you can do better than Krell.

"I tried different speaker placement tonight, according to the "golden rule theory" on the Cardas website."

Do you not have the speaker manual?

I think the manual is for the entire Revelation line, so I can copy and mail it. There is enough important information including room/speaker interaction information, general and Hales specific, that having a copy is necessary. Email me your address.