I really appreciate your input.
My problem is that I have no ability to install a cartridge on my Rega arm by myself.( It’s not a screw in type.). Whenever I’ve tried it I’ve screwed it up.
I’ve noticed that, but let me tell you that an MM cartridge must be installed without stylus, so it is impossible to damage anything. You add stylus when you cartridge body already screwed and wires already connected. Alignment of the cartridge is what you definitely have to learn and practice yourself, but it is very easy if you have a protractor like Dr. Feickert or the one you can get with Hi-Fi Test LP. Both tools are great and must have, you can find them used.
Too late, but i’m pretty sure this Sumiko is not your last cartridge :))
Cartridges cannot be designed to favor classical music! The idea that any component can favor a certain genre is entirely mythological. Usually this idea is applied to speakers but it really doesn't matter- what makes a component good for one genre makes it good for another.
Totally agree with Ralph's statement above. A good cartridge is good for all genres of music. Same about speakers.