Alfred Molon writes ...

How does such a printer compare with let's say a Lightjet on
Crystal Archive paper ?

I don't know about the Canon pigment printers, but the Epson wide
formats compare well with Chromira and LightJet prints ... what I've
done is have the same image printed on a LightJet and on my Epson 4000
and compared directly, and I think the LJ is slightly sharper but the
difference is not earth-shattering. Consider I can print a 16x20"
image for about 1/5 th the cost on my 4000 and that the prints have a
longer projected life-span and I'm happy with the 4000.

Here are two links, the first is for a well-known pro lab in California
that has both Epson inkjets and a Chromira laser and feels the Chromira
prints are usually slightly better, depending on the image ...
http://www.westcoastimaging.com/wci/...tip/tip15.html

And here's a link to an Epson enthusiast from last May when the 9800
came out ... http://www.josephholmes.com/news.html ... I think more
people would vote for the LightJet/Chromira prints, but given that the
Epson costs about 10% of a Chromira and 5% of a LightJet it's no
surprise most pros doing their own prints use Epsons.

The best way to judge for yourself is to have the identical image(s)
printed on each printer and compare side-by-side.

Bill