Rogue Audio Tempest II Upgrade

Has anyone upgraded their Tempest 2 to the Magnum status and if so what were the benefits? I bought KT-90 tubes directly from Rogue a couple years ago as I see that is part of the upgrade package so that would save some money. I have done some tube rolling in the past but wondered if the Magnum or Super Magnum upgrade would have some really nice benefits. Thanks inn advance.