Danny and Willowy suggested the following, although to be fair, Danny was listing what he already owned so didn't really suggest ALL of Batman or X-Men.
Fray
Captain America : The Winter Soldier arc
Preacher
Y: The Last Man
Charley's War
X-Men
Batman
Birds of Prey
Nightwing
Akira
Transformers\
Runaways
Avengers Disassembled
House of M
Richard Morgan's Black Widow minis,
X-Factor (the Madrox led version),
DC: The New Frontier,
We3.
Some old 2000AD stuff (Judge Dredd, Rogue Trooper, Strontium Dog, Nikolai Dante)
I'll pin this to the top of the thread and update from other suggestions until early next week, then edit it down to a couple that are manageable and make a poll. We can decide through next weekend and then start.