Doug: Here's a poser for you, spinning out of last weekend's conversation on our buying zeniths. In terms of greatness, readability, sustainability, influence, and yada yada yada, would you rather go to the first 50 (I use that term somewhat loosely) issues of the All-New, All-Different X-Men, or the Avengers encompassing the "Kree/Skrull War" through the "Celestial Madonna"? I don't know about you, but that's a tough choice for me.
I'm going to have to lean toward the X-Men on the greatness of the art alone. And then there was the awesomeness from issues 97-104 as classic baddies like the Sentinels, the Juggernaut, and Magneto rose up to attack our new band of mutants.
Of course, on the other side there's Neal Adams. And the bi-weekly "Avengers/Defenders War". And Englehart's time/space opera that ran from Avengers #129-135 and included three Giant-Size issues. Can I reconsider?
For our purposes, your "50"-issue runs are:
Giant-Size X-Men #1
X-Men #s 94-143
X-Men Annual #3
Giant-Size Avengers #s 2-4