Puritan PSM 136 vs Shunyata Denali V2

Hello all,

I'm looking to tweak my system and would appreciate any insights as to who has heard both and your impressions. I currently own the 136. I know there is a significant price difference, but the Puritan plays above its weight. I'm open to any suggestions. Additionally, is it necessary that the Shunyata be powered with Shunyata PCs?