Which processor has better audio for home theater?

The HTS 7.1 is not going to smooth things out or roll off the highs (Vayjay, I am NOT saying the Anthem does this FWIW). It will convey the signal without adding much of anything (in direct preamp analog mode) or taking much of anything away from the music. I like the HTS 7.1 because it is the only Pre/Pro that I have listened to that can do a very good job on 2-channel (*I have not listened to the Anthems). By the way, my system would be proclaimed by a lot of people as having a very bright potential - Krell FPB amps and Wilson W/P speakers with a GNSC modded Opus 21. I can say my system does NOT make anything bright sounding, but a bad recording can be bright if that is in the recording - my system will not roll that bad recording off.

"...They are excellent on music (except I'm a firm believer that NO processor will equal a good 2 channel preamp using music.)"

Well, without getting into digital EQ circuits and such, that assumes that one has an ample quality digital source(s) and or good analog source. If not, it can sound better processing internally (digitally) in a pre/pro, vs. otherwise, yes?

As for Krell vs. Anthem, I concure the Krell is ALWAYS going to be on the neutral side of accurate - which tends to easily be construed as "bright" in a system with some "bright component" in the chain! (it is a SYSTEM, not one single component that makes "a sound")
I would presume the Anthem, then, a little more forgiving of a sound? -maybe slightly recessed in the highs?
I've experience with the otherwise superb Krell 7.1, and find ZERO sonic flaws for what it is. I think it's simply superbly refined for an audio/video process. I've sold and owned Krell over the years, and think their processors are impecable digital pieces. But, it is system matcing, so you should try both brands(lol).
good luck

You must consider Proceed AVP2 and Meridian in addition to the ones you have mentioned above if audio if important to you. Proceed gets a superb review from the other forum. To my ears AVP2 and Meridian G68 are very close, and both excellent sounding. Just google "proceed avp2 mini review" and read three years worth of 108 page thread.

CAL Audio labs SSP 2500.