[Faceman]

Lots of item spoilers
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StotM and RoG are obtained in sidequest you can do as early as chapter 2 if you want (and dare [img]smile.gif[/img] ). Same for Daystar.
Shadow and Red Dragon Armor you'll stumble across on some common (but as most quests in chap2) not necessary quests.
Mace of Disruption (+1 or +2) is obtained in Bodhi's lair while fighting her for the first time.
If you are evil you could be in a position to gain Human flesh +4 now.
You could also have Crom Faeyr, Gesen Bow, Silver Sword, Wave and Equalizer by now (pretty much every assembled item)
There are lots more but which of them are useful to you depends on your PC and party.
And if you have missed them (as in: did that area but didn't pick them up) depends of what you have done so far.