If you are buying Z87 platform with new cpu then I think you wish to have something better than standard 1600 RAM inside especially that some higher clocked kits aren't much more expensive.
Maybe not cheapest but these are also interesting and low profile:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820144639
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231665
Maybe month ago there were 1866/2133 team vulcan kits at quite tight timings for ~60-68$ but I can't see anything above 1600 now.
Maybe not cheapest but these are also interesting and low profile:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820144639
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231665
Maybe month ago there were 1866/2133 team vulcan kits at quite tight timings for ~60-68$ but I can't see anything above 1600 now.