I put in DDM Tuning 5000k 55w HIDs and the difference is massive. I might switch the bulbs for the 4500k because you get way more usable light. Anything over 5000k and you start to get into a color/temp that your eyes aren't as efficient at picking up.
5000k and up will give you a white w/ slight blue hue and starts to blend in with the road.
4500k and below will you a white w/ slight yellow hue, this is closer to the natural sun light temperature.
I've had my HIDs in for 2-3 months now and never been high beamed or had any complaints when following behind friends and family. No halogen will come close. LEDS are almost as bright but I have no experience with any LED brands. I've used DDM Tuning kits in a couple of my cars and my bike with no issues yet. They have a 9007 bulb that does low and high beam.
Never been highbeamed since people are getting used to the ungodly bright aftermarket lights some use, after a while you just close your eyes till the finally pass.
They really need to start clamping down on this