How well would some of the better receivers from the 1970s work as a front end to a power amplifier? I'm thinking of Yamaha, Marantz, Sansui or Kenwood receivers with the preamp out, main in jacks. The tuners in most of these receivers are very good, how about the rest of the preamp parts?

analog-ML-3222-ML-

I am in the market for a turntable and am considering:

1. Goldring GR 1.2

2. Music Hall MMF 2.1

3. Pro-ject Debut III

I would greatly appreciate any comments on the pros and cons of the turntables.