You didn't mention your phono stage. Without knowing its gain and impedance characteristics no MC recommendation would be meaningful.
That said, my guidance is likely to be that you spend your next $1,500 elsewhere. Unless your other vinyl components (turntable, tonearm, phono stage) are entirely up to snuff you won't hear what a good MC can do. You may well, however, hear what your other components can't do.
Of the four major components in a vinyl setup the cartridge should generally be upgraded LAST.
That said, my guidance is likely to be that you spend your next $1,500 elsewhere. Unless your other vinyl components (turntable, tonearm, phono stage) are entirely up to snuff you won't hear what a good MC can do. You may well, however, hear what your other components can't do.
Of the four major components in a vinyl setup the cartridge should generally be upgraded LAST.