Dear Rockitman: IMHO that depend not only on the audio system resolution and facilities as what are your music/sound priorities what are you looking for.
I never left behind the LOMC alternative when I took the MM/MI one. Why? because there is no reason serious reason to left any of these alternatives when you knew both.
As I always name it are just alternatives.
What are my experiences on the whole subject ( LOMC vs MM/MI that never was my " attitude " and certainly not the main subject other that to know the MM/MI alternative along what I had: LOMC cartridges. ) is that the best MM/MI ( almost all vintage ones. ) with the right set-up can compete with the top LOMC ones bis a bis and if you push me a little even beat some LOMCs. There are a few MM/MI cartridges that competes easy with the A90 and other LOMC of this caliber.
Now, my main music/sound reproduction targets are accuracy, neutrality and even tonal balance. I can achieve those targets more easily with MM/MI cartridges, but that's me.
Even that my today cartridge reference is not a MM/MI one but a LOMC cartridge.
Cartridge tracking abilities is IMHO the lost-link on cartridge quality level performance.
We need, as I posted several times in different threads, that the cartridge's stylus stay always in the groove ( terrible road, btw. ). This cartridge tracking abilities in my experiences depend mainly on the cartridge whole design and not in what tonearm is mounted.
The cartridge behavior on that subject depend IMHO and experiences on it self.
Every thing the same between two or more cartridges the one with better tracking ability will perform way better not only better because one of the benefits of that tracking cartridge ability is that distortions goes really down.
We have to think on the cartridge tracking ability taking in count that the LP what's in the recording through the grooves came with distortions of different kind between them distortions caused by imperfect work by the LP cutter head in the vinyl.
IMHO the main target in any cartridge is not to increment the self LP distortions, that's why is so important that cartridge ability along other cartridge desired characteristics.
LOMC cartridges normally are not very good trackers but the few that are makes the difference for the better: lowering distortions.
The A90 is one of them.
Btw, buy a Clearaudio Virtuoso Wood and give a try for 2-3 weeks. Could compete with your A-90?, this depends on the cartridge whole set up: " mechanical " and electrical.
Regards and enjoy the music,
R.