Denon 103 or 103R, Matching/Specs. w/Rega Arms etc

OK, I've looked through the threads and tried to do my own research...but it's a lot of work to figure out some of the spec. (compliance, loading etc) issues and how important/priority it is to sonics, or when you're not really sure what everyone is talking about.

Eventually I plan to get a Michell Tecnodec or Gyro. I probably will have a RB250 on it with one of the tecnoweights (13g max). One day maybe will get a tecnoarm (believe it has a lighter overall mass than with its RB250 origin).

Is the stock denon 103 or 103R suitable? What about with a the Zu103 (R) mod (this cartridge is very heavy)?

I contacted Zu about their cartridges and they were very nice but still unclear about the specs/compatibility issues.

For all the analog sages out there, generally for all cartridges, if I want the best performance from my cartridge, what specs (specific numbers) should I be looking for to match with Rega arms (RB250 and their various renditions)?

Any "rule of thumbs" for LOMC cartridges and phonostages? (gain, loading/impedance etc)......

Does compliance have to do with the tonearm, and loading to do with your phono stage?

or point me towards a good book.

Thanks in advance.