Need some recommendations from the forum. I have been researching this on the forum and online, but doesn't seem like anyone has an definitive printer that fits the bill. I am looking for a mac-compatible All-In-One LaserJet printer that will work over the network when I plug it into Airport Extreme via usb (or separately via Airport Express). Preferred features to have: - Ability to scan to pdf - print duplex if possible (real duplex please). - Monochrome is fine Thanks!