Unless you KNOW that you need more cores then it's always better to go with a mainstream i5 or i7. You will save lots of money that can be spent on a better GPU.
I would love a new and updated FT02 that has more room for cable management, more room for watercooling support in the bottom and removeable hard drive cages/removeable 5.25" bay.
I think your Wireless problems comes from the fact that some Broadcom drivers are wonky as hell. The Broadcom chipset used in the Asus Rampage V Edition 10 is the BCM4360 (According to this review at least: ua.gecid.com/mboard/asus_rog_rampage_v_edition_10/?s=all), which is found in Asus...