E70 35d issues? (2010 and newer): Contemplating purchasing one

[X5Boise]

For my outdoor adventure vehicle, I currently have a Mercedes W164 ML Bluetec with the 3.0L diesel. While I like the MB in general, it would be nice to get a sportier ride and subjectively better looks of the 35d. There seems to be a few issues that can crop up with the X5 35d, based on what I've read so far (or are these fears unfounded):

-EGR cooler <2011
-NOx sensor failure
-Thermostat issue (leads to low op temperatures)
-SCR injector/temp/level sensor issues

What's the approximate cost to fix the above?

Also, in general, what is the reliability of these 35d? What are expected maintenance issues? And what are the other issues that can crop up that I would need to consider? I previously had an E53 4.4i and that was a very fun vehicle to drive, but it developed the nasty exhaust valve seal issue and I got rid of it a few years back--does the 35d have some similar dark gremlins waiting to come out of the closet?

Any other feedback from those that currently have the E70 35d? Thanks.