The 103R is similar in compliance to the Shelter, so it's unlikely to be a better match in this regard.
I wouldn't go buying other cartridges trying to fix a problem you haven't even heard. Is there some aspect of the sonics you dislike? Or are you just afflicted with audiophilia nervosa? (A common malady in these parts!)
If there is a sonic issue, and if insufficient system mass for the cartridge compliance is the cause, a simple fix would be to add mass to the headshell. You could trial this by taping a nickel (= 5gm) to the headshell. Rebalance the arm and set VTF to the same value you use now. Listen and compare. If you like the improvement, there are various ways to make the change more secure and better looking.
I wouldn't go buying other cartridges trying to fix a problem you haven't even heard. Is there some aspect of the sonics you dislike? Or are you just afflicted with audiophilia nervosa? (A common malady in these parts!)
If there is a sonic issue, and if insufficient system mass for the cartridge compliance is the cause, a simple fix would be to add mass to the headshell. You could trial this by taping a nickel (= 5gm) to the headshell. Rebalance the arm and set VTF to the same value you use now. Listen and compare. If you like the improvement, there are various ways to make the change more secure and better looking.