Sonic Frontiers is unfortunately defunct, but the head guy behind it now runs Parts Connexion, and he offers service plus upgrades on Sonic Frontiers gear. I’ve been through a number of phono stages by now, and the Phono 1 has impressed me the most in its "value for money" - yes, even compared to the Herron phono stage (which is excellent but priced a full level above). There is that caveat your output must be close to 0.5mV or higher, but looks like you’re there so I’d keep my eyes peeled. Mine is staying here for the forseeable future; it's unbeatable in my 2nd system :)
Happy New Year!
Happy New Year!