Belkin, Linksys, D-Link, 3Com and Netgear are the main good ones. Also if you only have one computer connected to the Internet and you're not going to network it with another machine, you should get a modem and not a router. However if in the future you're going to get another machine or make a network, then you'll need a router.
Modem = simple box that connects 1 computer to the Internet
Router = Connects more than one computer to the Internet and allows computers to be networked together