I would personally recommend an open source router from Linksys. The reason being you can get any feature you would ever want if you really want it.
The Linksys WRT54GL is your going to be your cheapest option ($60/£40). You'll get your choice of quality open source firmwares but I recommend Tomato because it's very user friendly. It has wireless-G and a 4-port 100mb switch.
If you really need more you can move up to the Linksys WRT300N (wireless-N) or the Linksys WRT310N (wireless-N and gigabit ethernet). Because these are excessive for the average user and because they aren't fully supported by third-party firmware makers I don't recommend them at the moment. I mean obviously if you need the said features you can just run them on the original Linksys firmware until the third party guys get their stuff together.
The reason I recommend these open source routers is because they have more features and will be supported longer by the third-party firmware makers than Linksys will support them. You pay a little extra but it's well worth it.
