Yes, X99 is lga 2011 and it's for Haswell-E not for Broadwells.
Also Intel will have a new chipset for Skylake as well.
Buying a 2011 board now might not be future proof like I said. Because most likely new Haswell-Es won't work on older 2011 boards.
So if you want to build a dream pc now. The best option is getting a 4790K and a z97 board.
Here are some great boards with wi-fi/bluetooth/widi capability and over the top overclocking potential.
MSI z97-Mpower MAX AC:
Digitally controlled 6+1 true phases doubled to 12. 12x of on-semi powerpak mosfets and 12x high quality ferrite inductors rated at 60amps. Capacitors are some custom made tantalum poscaps probably from Panasonic. These are highly conductive caps and rated at 200k hours @ 85C (and that temperature only happens under high overclock and full load, so it's pretty much impossible to hit.)
Also note that MSI team get the 1st position for water/air cooled cpu overclocking at Intel's OC event at Computex this year with this board. Which means they beat Asus, Gigabyte and ASRock.
Asus z97 Deluxe:
This board has digitally controlled 8 true phases doubled to 16 with some doubler drivers. 16x of nxp lfpak mosfets. Tad less efficient than the MSI ones. 16x of gold plated 60 amp inductors. And also some standard 5k rated solid polymer caps.
It actually looks tad more powerful (output-wise) than the MPower MAX, but the difference is impossible to notice since you'll be limited by your cpu chip long before you hit the motherboards full overclock capabilities. And also when it comes to overclock, efficiency and stability of the design comes first and MSI already proven themselves at Computex this year.
Also Mpower has slightly better onboard audio solution. Both has Realtek's alc 1150 codec though. And use pcb seperation, emi shielding and 600ohm amplifiers. But MSI employs highest quality nichicon audio caps which are the same ones that used in top notch studio grade solutions.
I don't know if ASRock made a wifi version of OC Formula this year. Z87 one had a quality wi-fi but I couldn't see any note for z97 oc formula. It's actually a solid board for stable overclocking. But since you want wi-fi capabilities z97 oc formula might not be an option for you.
If you want a really overkill board you might want to check MSI z97 Xpower AC and Asus Z97 WS.
Xpower's VRM is the most overkill and the most expensive vrm in the market atm. 8 true phases (digital) doubled to 16. 16x International Recfitifier powIRstages 3550 mosfets, each of them capable of 60A constant. 16x high quality 60amps ferrite chokes. Shit loads of tantalum poscaps all around the board etc...
WS also has a similar vrm design. Digitally controlled 8 true phase, no doubler. 8x of the same mosfets. 8x 60 amps gold plated chokes and 12K rated top notch platinum capacitors.
But to be honest both of these boards are really overkill. WS is actually a work station motherboard. Xpower AC, on the other hand, is focused on LN2 overclocking. So I really wouldn't really go for these two, since they are unneccesarily expensive.