Since you have inset the N-Gon and you have a supporting loop running around it(kinda like a containment edge :P) it really doesn't matter if you wanna bake it down(Like MightyPea said, loosen up the edges a bit). However if you really want to show the wireframe of the Hp in your portfolio than you can always inset it…
really no one gives a shit about ngons being in your highpolys, as long as it shades fine it is good, and you are follow the main rule about ngons which is to have them on a flat surface which you made with the inset. if your worried about wires, just use the cut tool to hand cut a few edges across the face.