Sony Legacy SACD Players - SCD-1, 777ES, XA-777ES

I am currently in the newbie market for a very good-to-great SACD player and was wondering if anyone could give me feedback on the differences between these three heralded Sony SACD legacy players, all obsolete now:

1. Sony SCD-1 - original two channel from 2000, balanced inputs
2. Sony 777ES - two channel from 2001, w/o balanced inputs
3. Sony XA-777ES - multi-channel player

I was wondering not only about their sonic differences, but if there were any reliability or usability issues between the three players. From what I have seen here on Agon, these can be had on the used market for less than $2,200. Has anyone heard all three of these?

Also, is there anything on the market today that competes with these legacy players, for less money new? Opinions? Thanks.