I had a SCD 777ES and sold it to buy a SCD 333ES + P3a with Dan Wright Mod and Monolithic supply. (I am waiting til the software comes out for my speakers before I get the P1-a). I have to tell you that the Perp Tech dac BLOWS AWAY the 777es on Redbook CD's and really aproaches SACD performance.This Dac is supper detailed with an incredible soundstage. The 777ES to me sounded rather dry and thin, no matter what I did it never came to life, except with a few of the best SACD's. So try a P3a with your SCD'1. I think you will be very pleased.