Much like I did when creating the Monsters Cheat Sheet, I created a cheat sheet for the heroes as it pertains to the Act I and Act II shop items.
The document links below contain information for all Act I and Act II shop items, including all items from the base game, Lair of the Wyrn, and Labyrinth of Ruin. We found that having this information all in one place helped to reduce the amount of time involved when heroes were deciding whether or not to take specific items, as well as when deciding what Act I items to buy prior to Act II.
Enjoy.
Act I Shop Items: https://docs.google.com/file/d/0B1VdxSyVrikwVmR0ZVUycW9XNXM/edit?usp=sharing
Act II Shop Items: https://docs.google.com/file/d/0B1VdxSyVrikwTU1KZFA1bmc1M1U/edit?usp=sharing