I've been demoing a Rouge Sphinx this weekend in my house, and I can't believed what I've been missing these past 20+ years! I knew the Chorus II's had a good track record, but they've never approached the sound quality that this amp is supplying them. My wife, who incidentally couldn't care less about sound quality, even commented on the improvement in the sound. I guess the Denon Integrated I've been driving them with all these years just wasn't a very good match. I also noticed with the Sphinx, the soundstage, depth, clarity etc., has been greatly improved. My ears no longer feel fatigued at higher volume. Not sure if it's the pre-amp tube section, or the overall hybrid design of the Rouge, but I'm sold. I was totally expecting to have to up the ante and get the Cronus Magnum, but the dealer didn't have one in stock to audition, so I took the Sphinx home, and haven't turned it off! It's probably just as well that I didn't get to hear the Cronus, as I'm sure it would have been even better, and it saved me spending almost double. I appreciate all the advice and feedback, and am glad I found this forum!