Last time, I knocked your socks off with that Marvel Treasury Avengers cover. Well, these 3 covers for the regular Avengers comic are pretty darn great, too.
Avengers #151 is a classic cover, with the big three dudes (Thor, Cap, Iron Man) and one of those "old order changeth" issues. It also marked the exit of writer Steve Englehart. You can see the original Kirby pencils for this one over at Kirby Vision, along with a new ink/color job by Scott Reed.
It's interesting how different inkers will interpret Kirby's pencils. Adkins changed the rendering in some places (Iron Man helmet and Thor's face) and the hand was changed from open to a pointed finger (probably an editorial decision). Scott Reed certainly does keep to Kirby's original pencils.
I think the cover to Avengers #156 is unique because of the perspective. The heroes are flying up alongside a building, trying to reach Doc Doom on top. Cap's guarding the Scarlet Witch while his comrades go on the attack. A great ink job here by my pal Al Milgrom.
Avengers #148 is my least favorite among this set, but still cool because of the Squadron Supreme and Hyperion holding Thor over his head in a triumphant pose.