The D-Link DSL2750U is a good device.Priced at 3, 140 ( now reduced) its quite up to the fuctions a basic home or office need ps. It supports various sharing options, both wireless N150 and N300.
It support a dongle via usb and along with the high standard security measures which include Wpa2 Psk. The device has hearing issues so u might want to have the modem in a cool condition when its on or else the net will start to trip. It has 3 years warranty, and a 4000V lightning power surge protection.