Dear Sonofjim: IMHO I think there is no best answer on it but tests and try different options.
I don't have experience with your mono Dyna but with its " brother " the XV-1 that is a different one on that compliance figure.
The EPA 500 could be a better match and you always can add some kind of weight at the headshell.
Btw, do you already try it in the EPA-500?
Now, as important is the tonearm/cartridge resonance frequency as important is that the cartridge " likes " the tonearm ( a very complex interrelationship. ).
This tonearm is very good and with its removable headshell give you great versatility to match your Dyna ( other option could be the Dyna 507 tonearm), don't worry because its low price:
http://www.audiogon.com/cgi-bin/cls.pl?anlgtnrm&1259217485&/Audio-Technica-1501mkiii
Regards and enjoy the music,
Raul.
I don't have experience with your mono Dyna but with its " brother " the XV-1 that is a different one on that compliance figure.
The EPA 500 could be a better match and you always can add some kind of weight at the headshell.
Btw, do you already try it in the EPA-500?
Now, as important is the tonearm/cartridge resonance frequency as important is that the cartridge " likes " the tonearm ( a very complex interrelationship. ).
This tonearm is very good and with its removable headshell give you great versatility to match your Dyna ( other option could be the Dyna 507 tonearm), don't worry because its low price:
http://www.audiogon.com/cgi-bin/cls.pl?anlgtnrm&1259217485&/Audio-Technica-1501mkiii
Regards and enjoy the music,
Raul.