What Cartridge please?

I have a ClearAudio Concept TT w/satisty tone arm, and currently using a Denon DL110 cart, but I want to upgrade. What is the best cart that this TT can fully utilize?? 
I want to stay with MC carts as I like their sound, and preferably a CA unit, but I'm open in that regard.
My phono stage can handle any cart I throw at it, so no limitations there.

Thanks Fellas,
Also available at $500-ish is the Audio Technica AT33PTG/II. It's not officially distributed in the US, but is easy to find on Amazon and eBay from Japanese vendors. It's also available on Japan-based audiocubes2.com.

It's like the AT33EV except that it has the boron cantilever and MicroLinear stylus, which is a quicker tracker and lasts longer betfore needing a retip--or so I've been told by my local long-running analog specialty store.
After some time (hours and hours) on the ol' interweb, I've seen the Shelter 501 and Lyra Delos come up several times. Thinking I may have to put them on my short list. But still open to suggestions.
Consider a Denon DL-S1, LOMC.  There are reviews here and on Audio Asylum.  I do not find any need to upgrade and the price was very reasonable.
I second WillieWonka on the Soundsmith upgrade. Don't underestimate it for the sake of change.