Re: Your top 5 Marvel graphic novels...
If we're talking Collected Editions/TPB's and the like:
1. Astonishing X-Men Vol. 3 by Joss Whedon
2. Captain America: The Winter Soldier
3. Invincible Iron Man: World's Most Wanted
4. The Infinity Gauntlet
5. Daredevil by Mark Waid - that whole ongoing series is awesome, but I know at least the first volume's been released as a TPB.
I'm more of a DC fan so I'm sure there are tons that I'm completely unaware of, but I really loved those.