Cartridge reccomdations?

Hi

ill be in the market for a cartridge upgrade by the end of summer so I'm looking for input. My tastes lean toward indie music such as Daughter, Belle and Sebastian, Cinerama, et cetera. I have a shelter 501 III and it's fantastic but if I can get better, I want to.  I've read that the Lyra Delos is a good cartridge for me. Any suggestions?
 Thanks!!!