The Brother HL-L8360CDW is a PC Magazine 2017 Editors' Choice winner and you can see why - it's easy to set up, prints fast (up to 32 ppm) has automatic duplexing, and great connectivity via USB, Ethernet, and WiFi interfaces. Mobile printing via AirPrint, Google Cloud Print, Brother iPrint, and Wi-Fi direct is supported.
The paper tray capacity is 250 sheets but you can expand that by adding multiple optional paper trays. With its advanced security features and higher volume duty cycle of 60,000 pages per month, this could be the ideal printer for the small office. Users report that it takes a while to warm up and start but if you can deal with that, you're getting a lot for the price and Brother printers are consistently at or near the top in reliability rankings.