I have a number of Sansui receivers, including a Six. It's a great sounding receiver. The sound is very nice, better than the Eight or Eight Deluxe, and better than tiny toy offerings like the Marantz 2015 (which I also have). They're rock-solid receivers, heavy, and very, very well-built. They sound every bit as good as seperates when used as originally intended, and with a fraction of the cost and space requirements. Sansui consistently leads with the best sound from a receiver; if it's functional, you can't go wrong. If you have the opportunity to pick it up, the Sansui 2000x is also an outstanding receiver for its size (not the 2000a).
