A part of that review seems really misleading to me, where it says that the Cherry Ultra is best for high efficiency speakers > 89 db. Balderdash. Poppycock. How can 800 wpc into 4 ohms not be stump-pulling power? Believe me I've heard a Cherry Plus pick a pr of B&W 802Ds up by their nutz and toss 'em around a room effortlessly. Not an easy trick.
I think Tommy meant that it has been used successfully on high-eff speakers, not that it can't do tough loads too.