I have been demo'd the EA 350 in the Company of other Phonostages and especially one Phonostage that has been able to go all the way to final demos at a Phon' Bake Off. , where it was compared to a £10K Phon'.
The EA 350 is a very decent Phon', the Search to better it to discover a much improved performance will also require that a rather large budget will need to be readily available. The $10K and upwards range of Phon's that are in the market place might find something to convince a change could bring more. I would sugesst between 10-20K not much differentiation will be found in SS Phon's.