It would be about the same price. However, you could go cheaper with lower quality parts. But only about $30 or so.
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148840
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231635
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103871
http://www.newegg.com/Product/Product.aspx?Item=N82E16817256061
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130652
http://www.newegg.com/Product/Product.aspx?Item=N82E16811822008
And you need a OS, but for basic things that you mentioned (assuming you are not using netflix), you could use Ubuntu and save $100 for the OS.
how much does this all total? I think i'll probably get Windows 7.