If you're gonna put them that low, you are better off putting them behind the stock grille... at least then you wont see them at all. Being they are that low, you're not going to notice much of a SQ or imaging difference... and your passenger's leg will still be in the way.

put them in the upper part of the door panel, in front of the door handle... and paint the grilles to match the vinyl... then they blend in... my friend did that in his 98 accord... looks really nice, and they are hard to see when looking in the car.

Or you can cover the mesh grilles and trim ring with beige-brown grille cloth...