1| You're running a Core i3-6100 which means you won't be able to take advantage of the Z100 series ability to overclock unless you plan on dropping in a i5-6600K in the near future and overclock on it.
2| Look through these shortlisted motherboard's but I'd recommend this one by Asus.
3| You might also want to go through this thread and make a followup to your post so that we could offer a better,if not streamlined, solution to your build.