Thanks for everyones input. I am looking into cartridges that would be considered an upgrade, but my budget is limited--mostly looking at a used Maestro V2 or Zephyr MK III with low use.
There seems to be mixed opinions about whether a new stylus improves the sound quality of the Virtuoso. Many say there's a big improvement with the 95ML, like Rauliruegas, or the Soundsmith Sapphire stylus, but some say not, so it doesn't seem like it would be a waste to try a new stylus, if I can't find something else used.
Drew