Ecka
I have the same EMM combo like yours, and also dCS and also Zanden and a few others ; to briefly answer your question , I bought what is called APL 2.5 ( the TEAC UX1 ltd heavily modified by Alex ) and in my system ( ALE compression drivers) , my room ( acoustically treated to match my equipment and my type of music) , and to my ears (and several others , known for theirs') it was better than the rest, simply more natural in recreating the original magic illusion , a special blend of smoothness and detail.
Certainly Alex is not an easy or average character , but assasinating his won't help the quest for better sound, with the possible exception of pampering some ego larger than ...well, pardon my French, private parts of some individuals
Having said that, EMM and the others mentioned are fantastic machines as well, and I couldn't listen so far to the Signature version which has rave reviews.