I have the Brother HL-2040 and absolutely love it. Those toner drums work forever and it's a speed demon. With advances in technology, I think it's time for me to go to wireless printing, and I'm tired of printing only single-sided (or trying to manually feed printed paper back in to try to get it two-sided. Are there affordable laser printers out there that print duplex, have wireless, and are Mac-compatible? I don't care about printing color or printing photos. I just want to quickly print lots of PDFs, Word documents, and websites (double-sided) via a wireless connection. Thanks!