IMHO, I don't think you need to upgrade to Maximus VII Formula or Maximus VII Hero - not much of an upgrade from V. That board you've got is good for a while and I would wait considerably longer for a worthwhile upgrade.
If you want top jump ship to LGA2011 then Asus X99 Deluxe is an excellent board. It's dripping with features and good for overclocking too. The issue for me when jumping ship from Maximus V Gene to Rampage V Extreme is the availability and cost of the RAM.