Looking at getting a new amp (NAD C370) and it needs a phono stage to go with my old LP12 (like, very old - serial no. 13XXX!). Now the LP12 is not my main music source - that will be a Mac Mini through a DAC (playing Lossless) so I don't want to spend a fortune. I guess my question is what external phono stage would be comparable to those found in say a Marantz PM7003, Yamaha AS500, Rotel RA-06 etc?