All looks good as far as your selection of new parts, looks like 7700k is the way to go for you. Just remember it is a very hot CPU so don't get freaked out about it. It seems like every day on the dedicated PC building forums there is a post every single day with someone worrying that their new 7700k is too hot.

You hopefully won't need the Arctic Silver as there is pre applied thermal compound on the Corsair AIO, but it's good to have a tube of thermal compound anyway because if you don't get the placement right the first time or need to reseat the CPU or something you need to remove the pre applied thermal compound and replace it.