I've heard the Magico mini in a smaller dealer showroom off good tube amplification. They are lovely sounding speakers, but again not as full and muscular, weighty, meat on the bones, whatever as other good larger designs I have heard. That is the only criticism I would have with them and I suspect that is why Magico makes larger models also.
Personal taste is always a big factor.
I've not heard the most recent Gallos, but have heard the prior version. I liked them at first but preferred Quad ESLs overall in that setup when I then heard them based on overall clarity and detail top to bottom, though the Quads are generally not considered the nth degree in dynamics either. The better monitors I have heard (magico, Totem, Dynaudio) compare favorably with the Quads in my assessment.
All things considered, I would lean towards any good monitor most likely over the Gallos based on my limited exposure, but I'll stick to my comments noting that smaller monitors are not likely to be the nth degree in macrodynamics, weight, meat on the bones etc., though likely still very fulfilling in that regard.
MErlin vsm may well be the cream of the crop and not even the most expensive. Most people who own them seem to hang on to them, always a good sign. BP is obviously quite passionate about his products and has seemingly spent years refining the design rather than changing directions, a very good omen. Don't know for sure. Haven't heard the buggers. Would like to someday.