Oh, you totally should! It has Tony's origin story, the original, and a tonne of early Steve stuff. Classic Silver Age. I don't know about digital copies, but you can get them in paper cheep as Essential Iron Man Vol 1 and Essential Captain America Vol 1. The black and white shows off the nice Kirby lines without the distracting four colour printing.

Oh, no worries. Some of my flist is outright harassing me on that point.