The Sansui AU series is highly regarded for its sonics and build quality. They are not completely neutral sounding, more pleasant sounding than explicit, but they do provide long-term musical satisfaction when matched with sympathetic loudspeakers. I use an AU-999 with EPI 202s and I suspect your ARs will be a good match. I've never used the phono input so I can't comment.
opinions
I have the chance to purchase either a Nad 3020 or a Sansui 666,both have been professionally serviced,I use the amp primarily to listen to vinyl which is played on a Rega turntable and i have AR 2x speakers,what are the pros or cons of either of these amps,thanks in advance