Uh...yeah, could be. Or maybe not. I've been giving Krell a chance over and over again since their debut. Haven't heard music from Krell gear yet. Sound yes; music, no. You have to understand that speaker manufacturers often use associated gear that they believe will not be questioned in demo use. It's the path of least resistance for acceptance, not necessarily an endorsement. But look -- lots of people buy Krell gear and say they like it. My experience is vastly different and I recommomend it to no one, on the merits. The original poster wanted to know whether Mac's upper end amps would be an upgrade. I am sure they will be if he tries them. And I make that recommendation putting my own negative perceptions of Krell on the table, so nothing is hidden. Krell is the sharpest wrong turn of many made by high-end hi-fi in the 1980s, IMO, and the industry in general is still paying for it.
Phil
Phil