I decided that I wanted to try out blacked out grilles on my Jerez Black E90 and settled on the "M3 Edition" ones. I ordered them from Jon at bmwpartspros.com and received excellent service and a great price and they arrived yesterday. I installed them today and I think they look great. Yes my car is dirty but it is my daily driver and it was supposed to rain/snow yesterday so I didn't have it washed after the last snow storm. The install is pretty easy with a T30 Torx and a long flathead screwdriver even though one of my bottom clips gave me an issue so I had to install the bottom first and then the top on the right side.
Here are the before, during and after photos to get a good idea of how they look.
I did purchase the gills too but didn't have a chance to install those as there doesn't seem to be an easy way to do that on an E90 without removing the fender liners.