I have Silman's complete endgame book and I think it is great for the value ($16 I think on amazon?). If you've already read one of Silman's books then your aware of his presentation and writing style and can probably judge if you'd like it or not from your own experience. One of the biggest reasons I like it though is that he partitions the end game material by his suggested rating categories so you don't have to get over your head in the material if you don't want to (a class D player only need read the material up to class D, or C if they want to be "above the grade" in end game understanding as their rated peers of said rating category). It also has material good up to the master level which is what really adds to the value of the book in my opinion because it is as the title suggests, a complete end game book!
I have heard that Seirawan, Averbakh, and Nunn's works are also very good however I have not read any of those titles you mentioned so I can't personally vouch for them. I am a student though so I go with what seems like the biggest bargin for the buck which is one of the reasons I got Silman's book (also have his reassess your chess which I like a lot).
I've read through some basic chess books, like Chernev's logical chess: move by move (awesome book), and Silman's complete book of chess strategy (which is more like a reference book than anything). I've also spent some time with the tactics trainer, and I'm a consistent ~1550. None of these things have explicitly taught endgame though, and if a game trades down to pawns and kings, I might as well resign.
Looking for a good, easy-to-follow endgame book with tons of pictures instead of paragraphs of moves. I asked around in some of the live chess popular games, and was recommended:
Silman's complete endgame course, Seirawan's winning chess endings, Averbakh's chess endings: essential knowledge, and Nunn's understanding chess endgames.
What's your advice?