I Need A Router

So, I'm currently looking for a router. I have been wanting to get one for a while, but now I am seriously into it. I am wanting a wireless router with at least 4 ethernet ports. I am going to use it for a few different things. Main reason is to get hooked up to Xbox Live. Another one is for my other upstairs computer to have internet access when needed. My dad has a laptop for work with a wireless card that would be easier to hook up to the internet with the wireless than un-plugging our main computer. And of course for the main computer to have internet access. I could probably just go with a 4 port, but I feel we might need wireless in the future, so get it now. I could use it for my Nintendo DS, Revolution, and Xbox 360 in the future, too. I'm trying for a sub-$50 price right now, but might go higher if it means a lot.

If you all have any suggestions for a good router, please comment them, it will help me out!