Al, was nice enough to loan me the Amarra 4 (uln- over the weekend and top to bottom it clearly bests the sonic studio 302 (uln-2). IT was better to the degree that I now have to find a way to get one.
From the moment it went in the system it was apparent, while the differences were there at Al's you really need to hear sources in your system to get a complete feel for them. I have rationalized the $6k purchase as not bad for a dac/phono pre and preamp.