Check out the NZXT Source 210, cheap and nicely made case.
Get a cheaper 6870 as well.
Use that money saved towards a better mobo.
No point in buying a 2500K with a H61 mobo since you won't be able to overclock it.
Downgrade to 2500/2400/23xxP i5 instead or upgrade mobo to p67/z68/z77.
Asrock has a very affordable z77 mobo out that is nice http://www.newegg.com/Product/Product.aspx?Item=N82E16813157297