D-link, Linksys, and Netgear are the big name brands. I've had Netgear routers and D-Link routers, both worked great. It all comes down to how much you want to spend for what features. WPA is a must nowadays.
It depends on the features you want. If you really want wireless-N standard hardware, you can get it, but I'd recommend waiting at least a generation. I have heard that many (perhaps all?) of the -N standard routers can adversely affect nearby wireless networks (the bad-neighbor effect).
I didn't want to spend quite so much, and I wanted an additional feature - a USB port on the router that connects to an external USB HDD to make a (probably slow) network file server. I chose the wrtsl54g linksys model, which at 100 is a little pricy but has some truly excellent firmware being developed (open-source) by some people. If you don't want the USB or special features from third-party firmware, just read the reviews on newegg for the things in your price range and pick something with what you need.