I'd like to add my praise for Lexmark and the printer. I got the E310 a few months ago, and have been quite pleased with it. With the base memory (2Mg, I think) it does postscript printing. It's worked well under windows and Linux.
I have had a few anomalies, but the tech support has been pretty responsive. And when some of the problems started getting suspicious (a whine and alignment trouble with envelops) they shipped me a new printer right away. Companies that stand behind their products are a little rare, and it's a pleasure to run into one.