I am in charge of finding a printer for my office. We print about 3000-4000 pages per month, only in black and white.

Here are the more detailed criteria:

~4000 pages per month printing
monochrome
must cost <$550
low cost per page
printer only (not multifunction)
does not need to be networkable
duplex would be nice, but not essential
long lasting, reliable

I like the Lexmark E360dn, but haven't been able to find many reviews on it as its a new printer. Thanks for the help.