In Cataclysm, entry into heroics requires an average ilvl greater than 328. Instead of linking to individual items, I will simply link to the wowhead search page pertaining to that item slot, so you can compare them with each other. I’ve also pre-emptively excluded spirit gear, as the stat is pretty much useless for mages. If you’re a Shadow Priest looking for a good list, click on the desired link anyway, and change the settings so that Spirit is removed from the filter, and is added to the stat weight. Enjoy!
Trinkets, and a pre-raiding loot list to come.