ribbon tweeters

[Kevin]

I am wondering if any one has experience with anything from the current crop of ribbon tweeter standmounts. Specifically perhaps the Quad S or Z series, or Martin Logan 15 or similar. My issue is I am trying to extract an extra ounce of detail in a smallish room, currently using Dali Mentor Menuettes (small but wonderful), sometimes rotating with Sonus Faber Auditors (for which the room is probably a bit small). Driven by valves (Prima Luna prologue). I read that the ribbon tweeters are particularly good at achieving a crystalline clarity in the higher range, not sure if its true or not as never heard any. Any experience out there?