Why not upgrade to a Z87 Sabretooth? It has the usual Asus high quality componenets, as well as being a rock solid Sabretooth board (as I'm sure your aware of).
I guess it really depends on your budget. If you want to pay the price for an excellent mid/upper range board, the Sabretooth is one of my favorites.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131976
That's assuming your upgrading to an 1150 CPU. If not then I would be curious to hear why you want to upgrade from such a good motherboard?