Cartridge suggestions for around 2K

I am thinking of upgrading my cartridge and would love to hear some of your opinions about which way to go. I am currently using a low output Grado Reference through an ARC Ref. phono pre with Aries/JMW 10. I would like to try a MC, but wonder about loading and output through the ARC as well as compatability with the JMW. I listen to a lot of acoustic music, Rock/Blues etc.