TheMailonG :
They're all too expensive in my country... What's the problem with the audio you mentioned?
Which would you pick from my list?
I don't understand why one Gigabyte MoBo (Gigabyte GA-Z170XP-SLI) would be that much different than any other relatively speaking if they were same price here.
As for the audio .... ALC 1150 is the "standard" offering for "Gaming" oriented Motherboards. Like anything else, a motherboard that costs less, has to cut corners somewhere, and an ever more popular way of doing this is to use a lower quality audio solution. With Z170, Asus did this on almost every board up to $150 in price.. luckily everyone else gave us ALC 1150 down to the $100 price point and sometimes even lower.
So while ALC 1150 is standard offering in most gaming oriented MoBos, to make the board more affordable (or to make more money of consumers depending how you look at it) manufacturers will offer lower cost audio solutions (as well as LAN and other features), below ALC 1150, is ALC 892 and below that is ALC 887. To my eyes, if you are paying over $100 - $120 you deserve to get ALC 1150.
Now one of the boards you listed did provide ALC 1150... my problem was the reviews from people who actually owned the board were not very satisfied with it. many will say that "well only people who have problems will go on line and report it". That's false logic in that it doesn't explain why one model gets 75% 5 egg ratings and another gets just 31%.
If here we can buy:
Gigabyte GA-Z170XP-SLI for $125 (w/ $20 mail in rebate making it $105)
Gigabyte GA-Z170-D3H for $105
Asrock Fatal1ty Z170 Gaming K4 for $139
That's a little less then a 20% difference between the two Gigas so it's odd that you see a much wider difference where you are.... And both are cheaper than the Fatality.
Can you tell us where you are located ? perhaps we can find a purchase source you haven't considered.