Excellent review, Tony. I bought this omnibus a few weeks back and have finished the first B&B set. I'm working my way slowly through the book and enjoying Kanigher's writing and the always excellent Andru & Esposito art.
All the stories from Star-Spangled War Stories are in the Showcase: The War That Time Forgot which I already have. Maybe someday I'll find a used copy so I can read the earlier work.I'm waiting for Marvel and DC to realize they can make more volumes of Essentials and Showcase if they just sub-title them "Adult Coloring Books" They really need to follow the EC example by Fantagraphics of putting together volumes by individual artists, like Western stories by Gil Kane or anything by Russ Heath. The Epic collections by Marvel are fine for younger fans, but I've already read all of those. I'm looking for the older stuff.