Hi Dotti...welcome to the Forum !
I would say that possibly if all six coils have shown signs of misfiring then probably best to replace with genuine parts but I would say good quality aftermarket components should be okay to fit as well (Bosch, Denso).
However, Spark Plugs...I would only use the best you can get (e.g. NGK, Champion) as cheap plugs could give misfires and fail prematurely.
Let us know how you get on
Regards Trevor