Recommend an MC Cartridge for my TT15S1 and...

Wow
That was like an episode of Mythbusters!
Ignoring the obvious fallacies of argument it certainly reframes consideration of the Denon 103/103R.
The Benz and AT will be considered noromance.as will the Concept MC by boxer.
 Thanks guys.

With a Sapphire cantilever and Micro Ridge diamond (SMR) and the paradoxpules modification you will have a difficult time out performing it for less than $3k.

Must it be MC? My favorite cartridge of all time is the Ortofon 2M Black. It’s MM. And it’s a spiritual experience during each and every listening session. 

Could not disagree more strenuously with the quote from Romy the Cat. I’m running a Denon DL-103M on a refurbished Garrard 301 with Ortophon T-110 arm into an Audio Research PH-3 then a CAT Sl-1. While it is not the equal of my Van den Hul Black Beauty Special X or Lyra Delos, it has nothing to be ashamed of. It is very dynamic, musical and extended.

While I believe the phrase "giant killer" is far too often used in our hobby, The DL-103M will compete with cartridges costing 5 to 10 times its price. A word of caution, however.  It is a fairly low output cartridge. Be sure your preamp/phono stage has the gain to support it.