I have been using a Dynavector XX2MKII now for almost ten years, had to have a Soundsmith retip, I used it so much.
Having never owned a Shelter cartridge, I can't comment on them. The XX2MKII I have always set the loading at either 500 or 1000 Ohms, if that tells you anything.
This cartridge will give a great deal of detail, slam, and just musical greatness, and it will reveal any set-up errors just as well.
I've been using a MintLP protractor for alignment, and a Fosgometer for azimuth.
I don't know if this is helpful, but it's something.
Good luck, regards,