I haven't used an extensive number of different cartridges, but I've certainly heard a lot of them in different TTs. I'm using a Grado "Silver" right now and like it a lot, but it's an entirely personal matter of taste. Speakers and cartridges, followed by different brands of tubes (if you have tube gear) have the greatest impact on the overall sound of your system and for that reason are some of the most discussed items of gear in the listening chain.
Grado cartridges are excellent, but may not suit your listening preferences. However, since you already have one, I'd get another headshell and try it out. You may prefer it and if nothing else you'll have a backup available just in case.
Best Regards,
TerryO