I've owned both and the 777Es is best bang for the buck. Needless to say I sold the SCD1 and the 777 is a keeper.
Sony SCD-1 vs SCD-777es?
It is getting tougher to find the 777es but the SCD-1 still seems to be available, even under $3k SCD-1 is much more expensive than 777es was more recently ($1500!) but the descriptions on the sony web site don't make them seem that much different. Can any of you comment on first hand experience comparing these two units?