You are looking at 3 outstanding products.... I would recommend 1 other if you would like a different take on how they handle music.
Ampzilla 2000 MkII mono blocks, they are about $10,000 new.
http://www.10audio.com/ampzilla_2000_2nd_edition.htm
Ampzilla 2000 MkII mono blocks, they are about $10,000 new.
http://www.10audio.com/ampzilla_2000_2nd_edition.htm