[COLUG] duplex postscript laser printer

[Dave]

I'm looking for a duplex laser printer that can directly handle  
postscript printing. I've never done duplex printing on a Linux  
machine, but on my Mac, I click a box for duplex in the print dialog  
for the HP Laser Jet 1320 I have at work.

The main thing duplex printing is needed is for printing a web page -  
want to avoid using two sheets of paper since a web page that is often  
printed takes just over a page.

Does anyone have experience with this one?

http://openprinting.org/show_printer.cgi?recnum=HP-LaserJet_P2015D

Basically I need it to print duplex from Firefox and also directly  
handle printing postscript files.

HP's site says PostScript "emulation". That word makes me wonder if  
can correctly handle postscript files (i.e., if I type lp file.ps will  
it work - assuming file.ps is a postscript file).

Thanks,
Dave