Let me give you something to think about as well as a quick response to everyone who has made good suggestions.
1) You aren't overclocking so any board that works will be good.
2) Almost every single motherboard can do SLI
3) Every mobo has space for 2x GPU + WiFi NIC
4) here's a big one. Only a few motherboards have support for EAX HD 5.0. That might matter to a gamer. Some games use Creative's EAX and you might want that support. The sound quality of most boards is good, but a few motherboards cheap out on audio. The sabertooth z77 uses Realtek ALC892 which is the older version. The Asrock Extreme4 uses ALC898 which is newer with better specs. The Z77 Professional from Asrock uses Realtek ALC898 as well. The Asus Maximus V Gene uses what Asus calls the SupremeFX III which has a 1500uF capacitor to provide cleaner power for the audio. It supports EAX Advanced HD 5.1 and all that via XFI MB2 (basically a Creative XFI card built on the motherboard).
5) You want to use wireless but many of these boards have an Intel chip controlling Ethernet. The Asus boards do. It's generally considered a better NIC if you are going to use ethernet ever. The Asrock Z77 Pro uses Broadcom BCM57781 but has dual NICs that supposedly can be linked for increased bandwidth capability (I don't know much about this technology though). The Sabertooth uses an Intel NIC as well.
Overall if you absolutely had to pick from these boards, the Asus Maximus V Gene is the best buy. It's cheaper, has XFI support, Intel NIC, has great software for monitoring. That said, you don't see yourself overclocking, this is where I have found the reviews to say the Maximus V Gene might be the most stable overclocking Z77 board available at the moment. I found one review thanks to a member on here RussianSensation who pointed it out to me, that the Maximus V Gene reached a higher stable overclock than any board they tested and at lower voltage than other boards required. That tells me the quality put into it is superior.
Then price...no overclocking does not demand $200 motherboards. Asrock's Z77 Extreme4 would offer everything the Z77 Professional will except dual ethernet ports, a few less HDD and USB ports, and no IDE or Floppy support (Really who uses that?). So save yourself almost $100 and use that toward an SSD or some memory.
For what it's worth Asus's P8Z77-V Pro comes with a WiFi adapter already so you don't need to add one. Gigabyte also has a few motherboards with this. Linked above by rgallant.
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