@gdhal ..................
I have an Esoteric SACD player which uses the PCM1704 r to r ladder dac, and my Sony music server in the same system uses some kind of delta sigma dac. I have found from extended listening that as much as I love the sound from the Sony Music Server, the same cd played on The Esoteric sounds noticeably better. When I say better, I mean not as up front as the delta sigma dacs. Instead of first row like with the Sony, the Esoteric with the ladder dac is more like 10th row.
With all that being said I have found over the years that if I am not pleased initially with a new product, no amount of break in or magic spells will make it sound much better than it is now. Because of that , I would never warm up to it. I finally got the T Refs well broken in and with the Conrad Johnson 250wpc amp, they sound much better than I thought possible. I hope you are still enjoying yours.