With the denon you need more gain. The shelter is borderline, depending on the gain on your preamp. I would go with the Shelter, a better cartridge with higher gain.
You might not need to change your phono preamp. At a latter date you can upgrade for a little more gain, and better sound.
My $0.02
Good luck
You might not need to change your phono preamp. At a latter date you can upgrade for a little more gain, and better sound.
My $0.02
Good luck