No, just no. The Meturm has no rolloff. Where the Metrum and PWD2 really smoked the W4S was in top extension and tonal balance. The W4S is a dark source dry source, the Metrum has great tonal balance and the PWD2 keeps that balance but is also butter smooth. Which might be what MH feels is an overriding colour where I just hear it as completely etch free, the so called analog sound. And yes it is a monster =)
The Metrum is one of the least colored and most neutral DAC's I've heard to date. It is not a dark sounding DAC, but neither is it a bright sounding one. It has exceptional transparency but may sound dry (especially if you're already using a headphone like the HD800), so I like to warm it up and give it some more body in bass by pairing it with April Music's Stello U3. IMO, most April Music gears I've listened to tend to sound somewhat dark, which is why I like them.
From the size and look alone, seems like i have to have this metrum. But maybe after i buy the koss esp950 first.