My M3 is not actually in my possession yet (I fly down to Houston to pick it up on the 18th) and some jackass already damaged the drivers' side mirror. Scratched the housing (Cosmos black) and smashed the glass.
New glass is $80USD from BMW, so I did some investigating. I saw a group buy thread on Bimmerforum from Euro-Spec back in Nov 2007, and emailed a guy there named Paul. They have overstock power, heated, tinted blue mirrors, with a metal base for $125 USD shipped. Probably a bit more to Canada.
Do a search on bf.c and you'll find the thread. Good feedback on the mirrors.