I have two of the 13-inch Sears LXI's - one silver and black and the other being off-white. In addition, I have the 20-inch, black Sears LXI cousin. All of them work very well with the C128's digital RGB, and the composite is nice, too, for the C64 side of the C128. The 20-inch Sears LXI also has a comb filter which aides in separating the chroma and luma signals of the composite signal (no separate chroma and luma inputs on the LXI's).
A few months ago our club treasurer gave his 13-inch, whitish LXI to another club member for use on his Commodores.
Truly,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm