I need a monochrome laser printer which has WiFi capabilities.No compromise features that are must1) WiFi capable2) low cost per page or cheapest/readily available toner cartridgeBonus if the printer includes1) Apple AirPrint support2) Ethernet port3) Duplex printingI went to HP showroom and the salesman tried to dump their inkjet printers on me and refused to show e any of their laser jet offerings. I don't want inkjet style printer.Any suggestions?