One note: If you are using your subwoofer's internal high- and/or low- pass cross-overs, you are filtering the signal from the Rogue through what may be an inferior cross-over vs. the cross-over built into the Emotiva. My point is, it's not a very fair comparison because of that variable. Just for grins, try comparing the two preamps without your subwoofer, just running full range to your mains.
I am not saying to leave your system that way, but just try it and see if the Metis ranks better. In my own experience, moving from the temporary x-over that came with my Vandersteen subs to a fixed in-line (and much higher quality) x-over made a significant improvement in clarity, imaging and soundstage. So much so, that I am planning on moving up to Vandersteen's best outboard x-over when I can afford it.
I am not saying to leave your system that way, but just try it and see if the Metis ranks better. In my own experience, moving from the temporary x-over that came with my Vandersteen subs to a fixed in-line (and much higher quality) x-over made a significant improvement in clarity, imaging and soundstage. So much so, that I am planning on moving up to Vandersteen's best outboard x-over when I can afford it.