what kind of monitor's can you use with a synclavier II?

You can use a VT640 terminal (basically a VT100 with RetroGraphics), a
Pericom terminal or any computer with appropriate software that can
emulate VT640 or Tektronix 4010 (essentially the same data format for
text/graphics).  Demas sells the Terminal emulation software which works
on a Macintosh.  You can find programs that will emulate the Tektronix
4010 for both Mac and IBM but they are expensive.  Check with
"electronics wholesellers" for the original terminals.  I see them float
around from time to time

Brandon Amison
Yaking Cat Music Studios
and Synclavier Information