I'm using Quicksilver Horn Monos with a Cary SLP-2002 preamp and Klipsch La Scalas. Jaw-dropping transients, superb detail, clarity and fullness. The Horn Monos are dead quiet and a great match for the La Scalas.
I used Rogue M120s before - way more power and great amps in their own right, but they were much noisier with high efficiency speakers like the La Scalas. The Rogues were more impressive sounding due to their much greater power, but the Quicksilvers are more truthful with respect to tone, clarity, and intimateness.
I'm extremely happy with the Quicksilvers, and the build quality is exceptional. The horn mono is a lower-gain version of the mini-mite, with some cosmetic improvements (and real binding posts!) Not a single problem with these amps so far - not even the slightest deviation from the same operational characteristics and behavior every listen. Rock solid.