There seemed to be a lot of widely varying prices quoted on here for this. I was charged £1100 for the 2003 749s Asymetric system (with ECU) - fitted. I have no doubt someone will be along to tell me different, but that was waht I paid at Italia in Oct 2004. The implication was that I was getting a bit of a deal on that too.
That reminds me - must go and chase up that replacement ECU that was on back order!