The following 2 are my top picks and personal favourites :-
Gut Maw (30 pts)
This allows your Ogre character to restore wounds to his profile by killing an enemy opponent in a challenge. This is a great piece of kit bearing in mind that Ogres usually should issue challenges to benefit from the overkill rule. Then you have more chance of winning the combat resolution and your Ogre characters should be tougher than the average enemy character in any case.
When you kill an enemy opponent in a challenge you gain the wounds which the enemy opponent had on his starting profile up to a maximum of your starting wounds +1.
I like it !
Greedy Fist (20 pts)
This is a sneaky subversive kind of defence (the sort of thing you expect a goblin to use, althout he probably wouldn't be able to lift it).
It's a gauntlet and soaks up enemy magic. If you're attacked by a magic weapon then, if you make a successful armour save, the magic weapon loses all it's magical properties for the remainder of the battle and counts as a mundane weapon. Best used against Dwarf runic weapons with multiple runes on :)
Not only that but any wizard 'struck' (which I assume means hit) but the Ogre with the Greedy fist gauntlet in his possession loses a magic level per successful hit (which could reduce a level 4 wizard to a non-wizard in a single round of combat)
If you take this item, which you probably should for 20 pts ! , make sure you have the full works when it comes to armour (ie. Heavy Armour + Shield)
Ogres... You just have to love them :)