I believe I read somewhere that the engine was being tested for the X6. Either way, I've been waiting to hear more about an x5 capable of competing with the Pepper. There is obviously a market and demand for this...if it makes it to production, sign me up! It would definitely satisfy my mod hunger... The 4.6iS would stay in the stable though, I may garage her and turn into a fam hand-me-down. Got the M6 on my radar...anyhoo looking forward to reading more into this X5 M and test driving!: