if your planning to upgrade go Haswell and:
i5 4670k - more than enough power for games
and as of the MOBO then I would opt for the ASUS HERO:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131989
its a great borad and does all that you need and more.
This is my current set up and I am VERY pleased, I also went for a GTX 780 - not because its the most cost effective but because I wanted one of the best single GPU´s and I could afford it.
If you want a good GPU then a GTX 770 is a very good but if you get some bundle with the 7970 then they are very similar.