Minor correction here. You won't lose steering controls if you go for an aftermarket HU. There is a kit called Connects2 which is a plug and play interface. Costs about 4-5k and lets you retain steering controls. Ofcourse you will lose Blue and Me, but who needs that crap thing anyway? And my friend, you need to listen to an ICE setup with an after market HU. You will definitely change your perception and would want to go for one. Esp something which can play lossless files. Ultimately its the source which is the starting point and it makes sense to invest in a good HU to extract the best out of your setup.