Dr. Zharkov,
"Translation" of a Word document into a PDF file takes
several minutes, not "some days". Quality will not
degrade during this transformation if you'll set
appropriate options for Acrobat Distiller (all
downsamplings = "off", color management = "leave color
unchanged").
But you don't have to translate your Word document into
PDF format. You can print these documents using PostScript
printer driver to disk files. These files (PostScript files)
can be printed on your LaserJet 5L printer using GhostScript
(the free PostScript interpreter). Without any loss of quality,
of course.
Passing your PostScript output through GhostScript can be
done automatically by the RedMon printer redirector.
Also without any loss of quality.
But using of PostScript-capable printer is easier, of course.
I can recommend HP LaserJet 4200 for heavy-duty
and HP LaserJet 2300 for medium-duty usage. Both printers
have 1200x1200 dpi print engines, very fast processors
and can provide straight print path. Prices in Moscow
from 480 USD (HP LJ 2300) and 870 USD (HP LJ 4200).
I use HP LaserJet 2300d printer (2300 with embedded duplex)
at home and very satisfied with it.
Or, you can buy newer models -- HP LaserJet 2420 ($670)
or HP LaserJet 4250 ($1100). I don't know anything about
them.
There are cheaper 1200 dpi PostScript laser printers.
For example, HP LaserJet 1320 and Lexmark Optra E330,
each costs about 330-350 USD in Moscow.
If you need A3 laser printer, look at HP LaserJet 5100
(prices in Moscow from 1400 USD).
With best regards, Victor Figurnov