I do not use speakers; I've got a fairly cheap USB 'rumble' headset and am thinking about an upgrade. My headset is stereo only, and I really don't notice much positional sound when it comes to other cars. Other cars get louder when they are near me but I don't hear them on the L/R when passing or being passed. I do notice and hear the curbs and bumps (when I drop a wheel off the road) in the L/R channels. Do you guys hear other cars around you positionally? What in game sound or windows settings do you use to get a 3-D sound stage? Any recommendation for a good sounding USB headset with good soundstage?