Development of the F15 X5 M continues...
Like the standard F15 X5, the next X5 M should also weigh less than the current X5 M. Expect it to be powered by the S63Tu from the M5/M6 (current X5 M uses the S63 engine), but with a power hike. We should see the X5 M hit dealers by the end of next year - early 2015.
Another clip (with bonus M3/M4 footage)
And previously posted video, in which it sounds killer.
Recent spy pics: