Personally i'd go with Asus or Gigabyte H170 chipset probably if I had to, but myself I'd really get a k cpu and z170 board, just costs a bit more. They have different features, which you can see in the below links.

http://www.gamersnexus.net/guides/2099-intel-chipset-comparison-z170-h170-h110

http://www.tomshardware.com/news/intel-100-series-chipsets,29993.html

Z: The Z-series chipsets are the top-of-the-line mainstream option. Intel normally launches its Z-series before any other chipsets in the family, shipping alongside early K-SKU CPUs of new architectures. Z chipsets are fully unlocked for overclocking, generally host more PCI-e lanes, and are the “premiere” offering among Intel's same-family chipsets. “Z” means “Performance” in Intel vernacular.

H: The H-series chipsets host the same CPUs and architectures as their more expensive Z counterparts, but are more feature-limited. The H chipsets will often include small business features that gamers will find useless, but also disable some other performance/enthusiast features (like overclocking) as a means to offset cost and reduce complexity.

B, Q: B and Q chipsets are targeted almost entirely at business. Small business features and virtualization features creep into the options offered by B and Q chipsets. Overclocking is disabled.

Yes. Unless you specifically require two SSD drives it is cheaper to buy a single larger drive.

I thought you might be doing raid or something so didn't mention it. Usually 1 is better, or if doing 2 you would at least do the same one and not different model/brands.