What you will find is that unless you really have the acoustics and room space to enjoy the extra watts, you will only drive the big boys to 40-50 watts anyway. You'll find that out when you finally get one, that's why I guess we're all letting you know that the Sansui XOXO and much of the G-series stuff is exceptional. And....for the most part, the audio specs and the "Sansui" sound is experienced with any of these models, including the 5050 and 6060.
Now, if you have the space and some great speakers with heavy duty woofers, then by all means.....8080 / 9090 / 9090DB / G-7500 / G-9---, I am salivating!
Enjoy your 6060 - focus and notice the deep sound and the fact that clipping and distortion on a healthy Sansui is almost non-existent! Great Receiver!