I'm sorry I'm just getting back to you on this. Hope you're still interested. Anyway, other than just starting from #1 in 1963, Avengers starts
to really hit it's stride around issue 50 and is consistently a good read to 200. 57-58 is the first Vision story. 93-97 is the Kree/Skrull War, and
116-118 is the Avengers/Defenders War. Starting in issue 123, Mantis's origin is explored and that leads into the Celestial Madonna saga from
issue 129-135 + Giant Size Avengers 2,3, & 4. This also includes detailed origins of the Vision and Mantis, details about the history of the Marvel
Universe, and culminates with the wedding of the Vision & Scarlet Witch. My favorite arc of all is the Korvac Saga, which includes issues 167, 168,
& 170-177. Those are the highlights, but you can really ready the whole run and be entertained. The is a standout single issue, too, #160. It's called
The Trial, but you'll just have to read it for yourself.