Lets not forget that the current generation of diesels are in their infancy. The old cloud of dust, need a calendar to clock 0-60 time is behind us. Diesels will only continue to get better, and as Mr D mentioned if the government continues to offer incentives diesels will become more and more common. There great performance and unsurpassed reliability will only continue to get better. I for one, will definitely consider one provided BMW keep them as part of the US offerings.
2015 M3 - Mineral White, Sonoma, Exec, LED, Adaptive Suspension, HK, 19" Light Alloy, 6MT ED 7/7/15 - On Order w/Adrian
2013 535i - Space Grey, Biege, M-SPort, Premium, Tech, Cold Weather, Luxury Seating, PDC, 6MT ED-10/11/2012 - PCD