Router Problems

Ever since we got the PS 3, our wireless router has been getting a very good workout. Add to that the laptop and the desktop, and sometimes, things get complicated. Jerry has been grumpy all afternoon because suddenly, for no reason at all, the PS 3 would not connect to the Internet. It kept saying DNS error. My laptop would act up every once in a while as well.

I am thinking that it might be the router that needs to be replaced. I am currently looking at my options. Perhaps a used cisco router would be a good choice this time. Any suggestions?