Kian was my 2nd favourite too. I've been doing some thinking actually (dangerous I know!) I feel like if we start with giving 2 middle names I'll feel inclined to give any other children we have 2 middle names as well. I wouldn't mind but is it something you'd want to continue with?
But anyway it looks like its between
Noah Alastair Charles Ferguson (sounds rather distinguished doesn't it) and
Kian Alastair Ferguson.
I adore both so I'll leave the final decision with you.