What Are the Best Iron Man Runs And/Or Arcs?

[comicscollector]

Have not read many Iron Man comics but from what i read the best ones were:

1-The David Michelinie and Bob Layton runs in Iron Man.
2-John Byrne and John Romita Jr and Paul Ryan run in Iron Man.
3-Dennis o´Neill and Luke McDonnel and Mark Bright run in Iron Man.

I only picked up one of the Iron Man comics by Kurt Busiek back then and just from that story it looked like a cool run of Iron Man comics.
The Kurt Busiek and Sean Chen run looked cool as well,it´s a run of comics that i will be reading eventually.