There is a three day sale on Kurt Busiek's entire run on Avengers from issues 0-56. It is one of my favorite runs of all time and I think any Avengers fan should try if they haven't already. This run includes two of my favorite stories in Ultron Unlimited (0, 19-22) and Kang Dynasty (41-56) as well as really good stories with the Morgana Conquest (1-3) and Nefaria Protocols (31-34).
There is great interactions between the entire team and everyone gets a chance to shine. You also get to see how great a character Scarlet Witch was pre-Dissassembled.