I topped out as a USCF A player. And like may i went with Dvoretsky's Endgame Manual, which was way over my head. Human nature. We don't like to admit we aren't as good as we want to think we are :-)
I have the Mueller book. It was still more than i wanted, or needed.
Silmans book was perfect for me!
I would also suggest De laVilla's 100 end games you must know.
Which endgame manual do you recommend and why?
I am currently reading Frank Lamprecht and Karsten Muller's fundamental chess endgames.
Thus far I have completed the chapters on Pawn-Endgames, Knight Endgames, Bishop Endgames, Knight & Bishop Endgames. However, I find the material quite dry and I difficult to remember, especially the chapters on bishops and knights.