Off the top of my head I would definitely recommend the Aurender A1000. But you have already auditioned that. You did not like it? What of the others?
If none of these are standing out, then perhaps your amp or setup is not up to differentiating the difference? Some more information on your system and what you listen to.
It would be great if you'd take some photos and create a virtual system. If you are not hearing differences in what you have tried, perhaps we can help with setup.