It's mostly a question of how much you want a West Coast IPA fermented with Belgian yeast and how much you want a Belgian Pale hopped at American levels. It's not necessarily an either/or question, but one of degree. C-hops for USA; Saaz, Styrian Goldings etc... for Belgium. I tried to emulate Achouffe (Amarillo, Saaz, CTZ) as best as I could with what I had when I made mine, using Centennial, Saaz and a little Nugget, which worked out nicely.