The meaning of the ending of the Sopranos is all speculation. I think we all are aware of the theory that Tony was assassinated. My problem is that Chase has never confirmed that. Any time asked in an interview, Chase always gives a "it can be whatever the individual wants it to be" answer. If it is so obvious and straight forward, then why not just say so.
Speaking of series that might be 10s, I just finished watching the 5 seasons of Damages. This series is extremely well written with an intricate plot and lots of twists and turns. The acting is great from a first rate cast of well knowns.
Its a who's screwing who story about lawyers....you're never really sure and there's lots of clues/bait and lots of flashbacks and flash forwards. The topics chosen are current.