Out of curiosity, are those who tried and disliked the Aeon with the CDM using balanced or single-ended? The CDM is definitely underpowered for driving T50RP based headphones in single-ended, but I haven't been able to try them balanced. Good results though with dynamic driver headphones run balanced (HD800), and also good results with the Audeze iSine. (Planar, but not so power hungry.) I recently got a Phatlab Phantasy (an even less portable "portable" tube amp than the CDM, lol), and that's much more able to drive T50RPs. I imagine the Sassy, which is their hybrid model, might be even better for those headphones with high power requirements.