Ditto to the good advice you've already been given above. If you need more height than the minimum insertion line of the stem, Nitto sells some taller Technomic ones to get the bars up further. There are various lengths and a couple of different finish options. The Technomic Deluxe is a nicer looking one (IMO, of course) technomic - Ben's Cycle (benscycle.com)

You can also see from the photos on this link the way quill stems are designed - why you loosen the allen bolt and then tap down on it to free the wedge and release the stem from the steer tube.