I kept the Audio Mirror T3-SE because it provides the most real, natural, 3-dimensional sounding image I've heard in my system.
The May, however, produces the most accurate and extended frequency response I've heard in the system. It's really striking how it seems to perfectly reproduce every single piece of the spectrum. It also produced the largest soundstage, both in width and height. It was super clean and detailed, without sounding digital or harsh. There was a touch of brightness, but I do believe that would have gone away if I'd been able to put more than 200 hours on it before being forced to pack up my stereo to prepare for a move. If I were more concerned about accuracy and/or details, the May definitely would be the winner. It's a great dac. Wish I'd been able to fully complete the break in process.