I second Roscoeiii's response. With an output of 0.15 mV, you'd need about 67 dB of gain from your phono pre, give or take a few dB depending on the gain of your line pre. That is a lot to ask of the phono stage, and noise does become an issue with lesser designs.
MC Phono Pre Gain
I'm looking at a Denon DLS1. How much gain will I need from a phono pre-pre amp?