I picked up an Alpine DVD based system off EBAY last spring (2004) for $600 used.
I think the model was nv-851a, it has a navigation ecu and a monitor ecu (which has
aux inputs for tv, movies...) and a 7.5" monitor.
   I put the ecus under the driver's seat ( had to cut out the front b/c I have swivels),
and mounted the monitor on the flat face front of the aftermarket dash that
eurocampers sells.  I purchased the new 2004 DVD from alpine, and I would never
go back to maps.  Any kind of destination you can think of is listed, and installation
was an easy weekend project.
   I can send pictures of everything if anyone would like, but not for another week or
so-I've got the whole dash out right now.  I think I may have posted step by step
instructions on the install here or on the syncro list last year.

-Ryan
'90 Syncro Westy
Chicago