Ok this is a totally different type of recommendation. But given that yuu stated that you drive a lot, you might want to consider SIRIUS radio. I', into electronica as well, and the other day I was listening to a sample of sirius on the web from their trance station and they played some seriously underground stuff that blew my mind...heck I couldnt even find it on kazaa.
I know you might not want to be paying monthly for 100 streams of 100% commercial free digital radio being broadcast all over the USA.... but it might be worth it. Heck they have 5 streams of different types of electronica. Their DJ's are really in the know too..not playing recycled stuff, but seem to really try and get some great underground stuff.
otherwise, go with burning CD's in your car.