I will answer your questions below.
-There is very minor wind noise which can be easily drowned out with the radio on low. However when the bar gets wet the noise picks up substantially but quickly goes away when the water starts to dissipate.
-The light is above the roof line about 3-4 inches. I can still clear parking garages if they are more than 6'9"
-It does require a deep socket to remove the light bar and I also recommend the RIGID locking nuts which they sell at ADD. I have been fortunate so far that nobody has tampered with my light bars. Been thinking about having stickers made advising that my truck has wifi recording capabilities or actually putting one of the go pro wifi cameras in to do the recording.
Talk to Micah at ADD and let him know you need a good deal.