I had the Krell 300iL driving my Maggies 3.6. I'm know driving the Maggies with a Spectron Musician III Signature Edition and the difference is night and day. There is nothing like a powerful and refined amp to drive speakers with low sensitivities. I thought 400w into 4 ohms were ok to drive the Maggies until I tried 800w into 4 ohms. There is a lot more control over the decay and solidity of the musical notes that weren't simply there with the Krell.
I've used this amp via the volume control on the Benchmark DAC1 and using Promitheus Audio C-core Reference TVC. The best sound comes with the TVC. The sound is taut, well controlled and very articulate. Imaging is simply world class. This amp is extremely transparent and will expose the strength of your system, but will also display the iniquity of any component in your system.
BTW, this combination is about the same price as the up-marked components in the list.
iSanchez