I have a few, but not all Eberron source books. I was pretty much going to limit myself to those. It's a rich environment to work with and as plenty of hooks I think. Specifically, I have the main Eberron book, Player's Guide to Eberron, Dragonmarked, Eberron Explorers Guide, & Races of Eberron. I think I have the City of Sharn book as a pdf on a different computer but I haven't taken the time to look yet. As my story unfolds you will have hooks that could take you to Sarlona so the Expanded Psionics might come into play for me (and I have that).
Can't think of anything else I might use at the moment. Is there any other sources you were thinking about?