I have the Acoustic Zen Absolute Copper XLRs which I felt were an upgrade from Harmonic Technology Magic Link 2's. I also have the AZ Absolute speaker cables which are great. I didn't carefully compare them to anything else but my system certainly doesn't sound dark.
But you specifically asked about AES cables, and recently I bought a Shunyata Etron Python AES cable that simply trounced my Audioquest Coffee Coax cable in exactly the same setup just different connections. And in talking with several people it seems the Shunyata digital cables are very well regarded in general. I don't have any other expensive digital cables to compare to but if you are doing a serious comparison I would add the Shunyata's into the mix.