Cartridge for ATP-12T

I have a Technics SP-25 with an ATP-12T tonearm.  I am currently using a Denon DL-103, and it is a really nice combination.  I would like to try another cartridge that would be a step-up from the Denon -- something that digs a little deeper and extracts more detail.  My budget is around $500. The ATP-12T is a heavy arm.  I am having a hard time finding lower compliance cartridge options that would work.  Any thoughts?

Thanks