Konia, he's asking for something specific, "the best" Kyo or Iori, looking in the database won't help. I dunno much about an SNK one, but if you want a CVS one, you can always try Kyo & Iori by Hero
http://herowarpgate.webs.com/characters.htm
For SNK.. Kyo by Sander would be the best choice IMO
http://sander71113.mgbr.net/kusanagi.html
as for Iori... Umm.. maybe ihoo's Iori
http://blog.naver.com/PostView.nhn?blogId=ihoo1836&logNo=90031729150