I have all RCA cables and have looked into the A-S MP-1, to much $$$, and the MP-3, not good enough even with the upgrades? I have never seen a used MP-3 on the 'Gon.
The FSP MK3 has been a pre amp with history and a good resale unit.
The Dude has great reviews here on the 'Gon. but has some bad reports on fit and finish on the web. Resale might be a problem but then again if one does not have to wait 90 days for the unit to be built it might sell in one day.
Pre amp in use is a RWA Isabella and it is a very fine unit and sounds great but I believe the two pre amps I am looking at will run past it with ease.
just got my Dude and it sounds great!! cant compare to FSP. The dude is quiet, dynamic, musical and the presence is spectacular. never heard base lines as clean solid or as deep. if you cant tell i am more than pleased with my purchase.