Diesel - Would you rather....E70 vs F15

[bdubz]

Hey fellow owners -

I wanted to get some input from you, I currently own a e70 x35D and I love it. Although I like new things as well, and have contemplated getting the new 2014 x35d.

I know that I will be keeping this diesel for a while, so that being the case thought if I have a chance to upgrade to a brand new one, this would be the time.

I've got 37k on my current x5d.

Is the F15 that much better with the 8 speed transmission, electric assisted steering, and lighter curb weight?

Pros & Cons insight and personal opinions are welcome.