Best?
There are SO many factors that need to be taken into account...
The Brooch of Shielding is nice if most of your opponents cast magic missile (and even if they don't, what other item in this price range nullfies the effect of a spell?).
Pearl of Power is okay, but it's a one use per day item.
The +5 to Spot checks from the Eyes of the Eagle is almost always handy.
A fully charged wand of Cure Light can be a life-saver in nearly any low level fight.
I voted for other, though, because I'm terribly fond of the Dull Gray Ioun Stone with continual flame cast on it.
Your results may vary.