New computer speakers to replace klipsch promedia ultra 5.1

[Am2Widescreen]

I was wondering what I should replace my speaker set with. They are difinatly dieing a fast death not turning on interferince I can not get rid of. So here is what I have already. I have 2 book shelf speakers a center bookshelf speaker. This is what I am looking to power them with and a sub.
http://www.newegg.com/Product/Product.aspx?Item=N82E16882115373
http://www.newegg.com/Product/Product.aspx?Item=N82E16882780012
I am getting the back speakers later. I will just use the old speakers from the 5.1 I had before. What do you think about this mix will it work is it worth it. Is it a good sub and Receiver?

[Am2Widescreen]

I ordered the subwoofer got a pioneer vsx 523k reciever. So I probaly will do a review some point in time maybe pictures.