Hmm, not overclocking. If you really want the two extra cores and the ram bandwidth stick with the LGA2011 platform and the 3930k.
For feature rich boards I like to stick with ROG ASUS boards.
LGA2011
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131808
But for cost/performance. You would be better off with an i7-3820 on LGA2011, save you 300 bucks and you could keep the quad channel ram.
Or a i7-4770 on an LGA1150 board, again a savings of about 350-400 bucks over a 3930k.
For even further savings, you could drop down to ivy bridge LGA1155 boards and chips. i7 3770 is $300 flat.
LGA1150 - non overclocking H87 or B85 chipset boards.
LGA1150 - overclocking Z87 chipset
LGA 1155 - non overclocking H77 or B75 chipset boards
LGA 1155 - overclocking Z77