I recently joined my local volunteer fire department, and I need/want a blue light for my car. I can't decide between either the Whelen Avenger Dual or the Whelen Slimlighter SuperLED. I originally wanted the regular Slimlighter but for some reason it's really expensive! And I prefer blue/white, and for some reason that's a big price jump. Anyways, any help with which one to get? And a tip for where to get one cheap would be great. Thanks!