Ombre Hair

My hair definitely gets darker year after year, but since I was pregnant my natural color has gotten incredibly dark! My roots look terrible and I am tired of it.  I have gone all brown two or three times over the last 10 or 12 years and I never like how it looks.  I always end up going back to put blonde highlights in it.  So I am headed to the hair dresser tomorrow and am using these photos below as inspiration.  What do you think?  Which one do you like best?  Ombre is in, so I mind as well take advantage of the dark roots trend.