The wrapped blue e87 had only the front 1M clone'd bumper cover. So it has the narrow front end(& rear end). I think it looked fine.
I think IF you were to put a complete 1M front end on your car... it would look fine without doing the rear. I do think you will need some spacers or the M suspension bits to fully pull off the 1M look.
This blue 1er was seen at last years Welt 3.0