It's faux pas, pas being French for “step” (as well as homonym for “not”) -- false step. Personally, I'd use a Nitto Technomic (regular, not deluxe has a longer neck if you're trying to raise the bars higher), or a Nitto Dirtdrop (looks better to me for lots of stem “exposure,” but only available in one extension, about 8 cm). That said, you should do what you need to, to make the bike a good rider for yourself.