If you like Sonus Faber GPH, the Cremona Auditor does all that the GPH does, except much better. I personally think the Sonus line is a bit more musically versatile than the JM Labs. Specifically the Cremona Auditors rock much better than my Electra 926's. But the JM Labs are excellent speakers, and I believe this is particularly true if you are using tube gear. Nothing I've heard beats JM Labs for well recorded female vocals, for instance. But I find them quite unforgiving and not that well suited for some of my music collection.
To be honest, though, neither the JM Labs nor Sonus Fabers are my favorite in the price range. For me, the best is the PMC OBH-1. This is a wonderfully accurate British speaker without a characteristic "audiophile" sound. They do require a pretty powerful amp to drive them, and tubes are really out of the question. But check out some reviews, and much more important, audition a pair if you get a chance. (There is an interesting thread here comparing them to ATCs that you can search for.)
To be honest, though, neither the JM Labs nor Sonus Fabers are my favorite in the price range. For me, the best is the PMC OBH-1. This is a wonderfully accurate British speaker without a characteristic "audiophile" sound. They do require a pretty powerful amp to drive them, and tubes are really out of the question. But check out some reviews, and much more important, audition a pair if you get a chance. (There is an interesting thread here comparing them to ATCs that you can search for.)