The 562 series can all take the Meridian 515/516/G15/G16 phono stages that are a plug in board. This would give you the step up (which is also adjustable for sensitivity) and ADC that you need as well as room for expansion of your system. Clearly it would also integrate with the Meridian comms system for input switching etc.

Richard

Main system; 861v8 ID41, DSP8000SEU fronts with DSP5500 centre and DSP7000 rears (all in lovely silver) 504, HD621
Second system 861v4 ID40 LPS, G98DH, 504, HD621, 2x DSP5200 with DSP5200 centre
MD600 tucked away in study. Lots of other Meridian!