I would recommend getting a Z97 motherboard if you are going for the 4690k. If you are going with the Z87, then get the 4670k. The 4690k is made for the Z97 platform. The 4670k will work on either Z87 or Z97. I don't know about the 412s, but it seems expensive for what it is. Maybe someone else has more knowledge on it. Everything else in my opinion looks good.
Looks good but really should get a Z97 Motherboard. You might want to look into the Samaung 850 series for an SSD. For the overclocking you might want to look in to a better cooler but other than that the build looks good.
I agree. Today there is no need to buy a Z87 motherboard anymore. Especially since the Z97 is backwards compatible with the first gen Haswell. Even if the board were cheaper, it would still be a hard sell. Z97 has many more features to boot.