I just installed conti DWSs on my X5M. The sound difference between the DWS and stock RFTs is significant. The DWSs are quiet at all speeds except for 76-78 mph. For some reason when i hit that speed, i heard a higher pitched hum from the wheels. The hum goes away at 78 and then pops back on at 83 mph. Very strange. Allegedly... it goes away again at 85mph and stays quiet until 110, but that's speculation on my part
. Hopefully the hum will go away as the tire breaks in. All that said, i'd recommend the switch. Also pieced together the 19in space saver spare kit for piece of mind.