If using moving magnet or hi-output (0.8 mv @ 5 cm/sec) cartridges, try the Audio Research SP 9 MK III. Using the tape-out outputs the SP 9 MK II was indistinguishable from the SP 14 (the line stage was more veiled, less good overall, but also less "hard" sounding at times). The upgrade to the MK III substitutes MIT Caps for Wondercaps, doubles power supply capacitance, and improves grounding, resulting in much better bass extension and dynamics and less system grunge. The unit is still VERY sensitive to line noise, so I suggest using a sound conditoner or VESA blocks. Phono overload is 200 mv @ 1 K, and it maintains equivalent overload at 10 K. This, combined with relatively low noise levels makes it sound very dynamic. It is best used with a more up-to-date line stage (or maybe its the 6922's in the system; I much prefer the sound using the ARC LS 16 MK II). Also, consider getting a kit for an IEC power connection that is said to be available from Len at ARC.
Good hunting!
Good hunting!