I had the same problem as you. I actually had a 2011 35d on order until I saw the 2012 price sheets, which also included the pricing for the 35d (although the price may change).

I drove both for an extended time. My dealer here in Germany (military sales) allowed me to take a diesel for 2 days and a 35i SA for 2 days.

To be honest, you can't go wrong with either, but, in the end, I chose the 35i SA.

1. I refuse to pay for a 2011 when a 2012 is right around the corner, regardless of the credits that are being given.
2. In Europe, it does not get that hot, so riding with your windows open is actually better than using A/C. I tried it with both vehicles, and I don't care what most say here, the 35d is damn loud.
3. The torgue in the 35d is excellent, but, the shifting of the transmission in the 35i, is waaaaaaaaaaaaaaaaaay better, plus the responsiveness of the vehicle is better.
4. Around town driving, 35i is hands down better.
5. Diesel is a beast on the motorway, but, 35i is also, once it is in top gear (I was normally pushing it around 100-120 on autobahn) and all I can say is WOW.
6. Diesel gets great gas mileage, 35i is OK. If you driving is mostly city, then it is a wash actually, and according to some, it may even cost you more to own the diesel. I figured it out, it would take me almost 3 1/2 years to recoup the difference in price.
7. If you find the 2012 pricing sheets, you will see that if you price out a vehicle, it some cases, you actually save money by going with a 2012 over a 2011.

I guess, it is personal choice, but, again, regardless of which route you go, you will be very happy.

Just my 2 cents worth