I finally bought a new printer. My 10-year old Lexmark is still a great postscript printer, but its limited memory and interface options prevented it from taking significant print jobs over the wireless network.
I purchased a speedy, 21 page per minute, Brother HL5170DN. It can even print on both sides of the page! We’ve been continually impressed with how fast our documents are generated. Another cool bonus feature is that it supports Internet Printing Protocol, allowing us to print from anywhere via the Internet!