What audio receiver will work with my home theater system?

-I have 2, 3-way 140 watt floor speakers and am planning to get the polk audio psw505 subwoofer (http://www.newegg.com/Product/Product.aspx?Item=N82E16882290130). I'm not very good with home audio stuff and dont want to spend a bunch of money, so what receiver will work good with this set up and not break the bank?