Herron vs PS Audio BHK vs Rogue Preamps

I’ve had the Rogue Rp7 and the BHK. The BHK is cleaner sounding and measures better. It doesn’t round off the leading edges of transients like the Rogue does. I can’t speak for the Herron. But if you can swing it, I strongly recommend you try out a used ARC Ref 6 if possible. I’ve heard one and it is far better than the other two. It’s got tremendous drive and is much more dimensional, more real sounding.