+ 1 for the square tips!
Thanks to Jimmy D, I was able pick up his chrome tips to switch out my black tip . I set them about 3/4" from the bumper facia...the contrast with the M Sport diffuser looks good to my eyes. Car is otherwise still a stock and mellow ride.
Just as a back up, I'm sitting on a set of '07 M6 mufflers ready for a quad tip conversion just in case I tire of chrome square tips. If I go that route, I think all will be lost since I'll want to put on an M5 style diffuser, add some 3" mandrel bent pipes all over, drop the car with some coil overs, through in some Dinan 2, etc (Yikes!)