Re. Graphics System

What I would like to get is a complete, stand-alone system
of some sort.  This would consist of a CPU with full memory
(such as an 11-45 or 11-40), a graphics terminal
(1000x1000 points), some sort of disk, a magtape unit for backup
of data, and the necessary interfaces for a Versatec, a lineprinter,
and 300-baud send-receive modem line to allow easy communication
with external micro systems (for student input stations).

The operating system could be one of the standard PDP11 systems,
such as RSX-11, however it would be nice to have FORTRAN IV-Plus.  
My programs do an awful lot of thrashing around with floating point 
multiplies so it would probably speed things a good deal if there 
were some kind of floating point hardware in the system.  It is
during the screen editing process where speed is a factor.  When
this is going on it's almost like doing real-time animation.

As to the graphics terminal, I have found it is not very satisfactory
to work with 512x512 screens - such as SAIL's DATADISK system.
To really see what you're doing you can't have more than a few
bars of music on the screen at any time.  You spend most of your
time just shifting your "window" around.  I have come to prefer
real vector displays to raster systems because of the ease of
doing overlays and selective erasures.  But I'm told that with
the right hardware and software the user should hardly be able to
tell the difference between the two systems.
(At IRCAM in Paris we have a VT11 which is quite satisfactory.)

As to disks, something like a fast Winchester would be great since
that would make it relatively painless to retrieve things from
the library of musical symbols.  A mammoth capacity is not needed
if there is a standard magtape backup system.  I much prefer
magtape to the new cartridges, etc. because eventually there would
be a very, very large amount of data put into long-term storage
and the cost per bit of storage would become a major factor.

If all of this is too "grandiose" as new equipment perhaps DEC 
has an old  traded-in GT44 system in the back of some warehouse 
gathering dust.  Do they have the digital counterpart of a used 
car lot?

I am not well acquainted with the newest DEC products.  Perhaps
there are now smaller, cheaper systems that would do everything
I need.