I have listened to the new 805S 's for close to two hours. The Merlin TSM-MX's are better in nearly all respects. I have not listened, yet, to 805 Signatures, but I'm told the 805S's are a poor man's 805 Sig, and that the sound is the same or close, but that the Sig has the better finish. If so, the Merlins are better.
Most versions of 805 I have heard and the Merlins cut off bass extension at similar levels. I've heard 805's image well, although Merlins are better here. Niether have a decisive edge in dynamics. But where the Merlin TSM's really pull away from the 805's is in the accuracy of midrange reproduction. (Also the coherency of the midrange and the highs.)
Most versions of 805 I have heard and the Merlins cut off bass extension at similar levels. I've heard 805's image well, although Merlins are better here. Niether have a decisive edge in dynamics. But where the Merlin TSM's really pull away from the 805's is in the accuracy of midrange reproduction. (Also the coherency of the midrange and the highs.)