Thanks SRT6 in MI for the advice. That is disappointing, because those would perfectly match the HIDs perfectly. To halfway answer your question, there are several members on the forum who have HIDs for both the high and low beams. Most newer cars use a bi-xenon setup which uses just one bulb and a mechanical part to adjust it for high and low beam. This is why newer vehicles do so well with high beams.

If you predominantly use your high beams just to flash at oncoming vehicles, etc., HIDs will not do well. If you are like me and often drive on dark back roads, keeping your highs on pretty often, they should not be a problem. This is probably the route I will go since the LEDs will likely be a bust. Yes, they do take a few seconds to warm up, but they stay warm for a while, so even if you were to have them on for a period of time and then need to turn them off (when hitting a main road) and flash occasionally, they should still be warm and cause no problems.

Hope this helps!