First one,
a) Immunity to all +1 weapons: Well, they gotta have at least a +12 weapon to hit me! Harharharhar!

)
b) +2 Consitution: Oh It's great! I dont know about regeneration but if it's true it's GREAT! And also 21 Con will give you extra HP's.
Second one,
a) %10 Resistance Magic: Come on it's nothing! It's only %10!! You'll take 10 damage instead of 11.
b) +2 AC: It's GREAT.
Third one,
a) +2 to all saves: It's GREAT!! Definetly!!
b) +15 HP and Blackrazor: There's more powerful swords than blackrazor in ToB as I heard. And 15 Hp is nothing for your main character but even you're level 30 stil you can fail saving throws so go for the saving throws +2 I say..
Four..
a) %20 Res to fire, cold, electric: Items grants you resistance. But if you dont care about xp may be useful.
b) 200.000 Xp: SOunds good. Nice. Why not?
Five..
a)+1 Wis +1 Cha: If you're not a priest.. it's useless.
b)+2 Str: Are you kidding??!!
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"Not for your eyes only, also for your beautiful ears.."
Yngwie J. Amadeus Zoltan "Diamond Fighter of Aerie Lovers Sacred Band"