I'm in the making the one of the best places to buy OEM BMW parts on the web, so i want to know from all of you X5 owners what you feel is the best OEM upgrades. I know all the ones for e38, e39, and e46's, but i don't for the X5's. My local dealership gives me great prices, so i just want to help other people out from getting shafted with BMW prices. I can only get parts that BMW sells and i just bought a SAT radio for $300 module, cables and the antenna, great price? Bluetooth modules for $325 10th Gen, also latest part # for TV module $670 and the whole setup 1K, So please can you tell me all the BEST OEM upgrades. About 2 months ago i bought the Areo kit for a X5 and they charged me $1300 for everything, 2 bumpers and the side skirts with the running boards, is that a good price?