I've heard of quite a few complaints about HID lights interfering with computers. Have you thought of going with a helmet mount? Perhaps that will position the light far enough away from the computer receiver to avoid interference problems. And then get a halogen light for the bar. I use a JetLite halogen setup and it doesn't cause any problems. I also like the idea of a halogen light in addition to HID because HID has a delayed startup time while halogens are nearly instantaneous.