personally,dont like the matt black look,looks like the panels have been sprayed,and have seen a couple of cars in the area that has been done,if it isnt looked after,then it looks ugly.
there is 2 135i's that come through to the hot chocolate runs,on a matt aliminium colour,and the other a burnt orange matt,and it looks awesome.
on the picture you posted,if you go that route,then smoke the tail lights,and matt black rims,basically murder it,then will look alright