I looked at getting the VK-2100 when the MC-100B came my way via ebay. Interestingly, your Rogue & my Yaquin were both KT88 equipped amps.

I've been really happy with this setup; however, I attribute much of its strengths are due to the power, dynamics & fine articulation of the twin EP-400s. They are quite spectacular for music & the M2s just play happily & accurately along...

TAM