If your tonearm truly is 13g, that's moderate and excellent fit for Denon 103R. And based on the math, it puts you in the sweet spot of roughly 10-11Hz resonant frequency.
It should be noted that most Japanese companies measure the compliance of their cartridges at 100Hz, so you almost double that figure to use in any RF equation.
There aren't too many other MC carts in that price range that would also work well with your set up. Ortofon MC Quintet Red is the only other one I can think of.
But really, this is all based on numbers as a guideline. I would also email Schiit directly and ask them what kind of MC cart they recommend. A company like that would get back to you.
It should be noted that most Japanese companies measure the compliance of their cartridges at 100Hz, so you almost double that figure to use in any RF equation.
There aren't too many other MC carts in that price range that would also work well with your set up. Ortofon MC Quintet Red is the only other one I can think of.
But really, this is all based on numbers as a guideline. I would also email Schiit directly and ask them what kind of MC cart they recommend. A company like that would get back to you.