If you want to be able connect to wireless then you will need either a card or adapter. I don't know much about the killer cards. Maybe someone else can give an opinion on them.
That system is going to be sweet I am very jealous!!!! Just wish I had the funds currently to build one.
So i got everything...but in the end im gonna have to spend an extra 150+ since newegg says i busted the mobo..im not shocked..it was a pain in the ass tryin to get that mobo to fit..i had barely any hand room..so atm i am pretty bummed n watchin my computer just sit there useless...:/