I appreciate all the replies but clearly there are numerous opinions about the shark fin antenna. jmonier is right, there is a sat radio prep delete available for the E93. I had heard that this will delete the shark fin, this what I was trying to confirm. However, seems like an antenna would still be needed for the Nav system.
Colonel (Retired), US Army/Hagerstown, MD
ED-01-10 2010 Z4s30i AW/Beige/Burl/ 6MT/SP/PP/CWP/NAV/ipod/USB/CA
2011 335d BS/Oyster/PP/CWP/NAV/ipod/USB(Daily Driver) 30+ mpg
1988 635CSi black/tan/5MT/Dinan chip/B&B exhaust/RD sway bars/Bavauto stress bar