I had actually used your review to assist in my purchase decision.
My dealer was kind enough to loan me the lp5.3 for a couple of weeks while the 310lp was on order. According to Simaudio, only a couple of capacitors in the power supply portion have been upgraded in the 310lp when compared to the lp5.3. I am very surprised to find that the 310lp is substantially quieter than the lp5.3 was in my system, which was quiet to begin with. The noise floor is almost non-existant. Very pleased with this unit. Running balanced at 60 db gain, 100 impedance and the IEC equalization filter with the Clearaudio Concept and matching MC.
My dealer was kind enough to loan me the lp5.3 for a couple of weeks while the 310lp was on order. According to Simaudio, only a couple of capacitors in the power supply portion have been upgraded in the 310lp when compared to the lp5.3. I am very surprised to find that the 310lp is substantially quieter than the lp5.3 was in my system, which was quiet to begin with. The noise floor is almost non-existant. Very pleased with this unit. Running balanced at 60 db gain, 100 impedance and the IEC equalization filter with the Clearaudio Concept and matching MC.