Also, you'll need the special
 DEC monitor that goes with whatever station you are buying, you
 can't use a
 chincy PC compatable monitor with a VAXStation. 
However, a good quality multi-sync (i.e. modern) PC monitor
with BNC inputs will probably work fine.  I'm using an
Iiyama Visionmaster 17 with a VAXstation 3500 (VCB02 video
adapter) with no trouble.
(And I have my PC plugged into the VGA input, so I can switch
between VAX and PC using the monitor's front panel buttons.)
Later,
Kenn