Handymann,
The real issue is one you highlighted, that your turntable is way below the level of your phono stage and preamp. Therefore a good low output moving coil will potentially be too good for the arm and sound awful. My suggestion would be to find a lower output cartridge of medium to high compliance for the budget arm on your deck. My suggestion would be to look at the Grado MI cartridges as they have Moving Iron cartridges with 0.5mv output in both the Reference and Statement Series from about $350. The other recommendation would be the cheaper Benz MC's with low output as they are medium compliance.
The real issue is one you highlighted, that your turntable is way below the level of your phono stage and preamp. Therefore a good low output moving coil will potentially be too good for the arm and sound awful. My suggestion would be to find a lower output cartridge of medium to high compliance for the budget arm on your deck. My suggestion would be to look at the Grado MI cartridges as they have Moving Iron cartridges with 0.5mv output in both the Reference and Statement Series from about $350. The other recommendation would be the cheaper Benz MC's with low output as they are medium compliance.