Plus, you can get a spiffy robe, if there's one that suits your fancy. I don't recall any good bracers for spellcasters, although there's a pretty good chance that I'm overlooking something.Patryn of Elvenshae said:One thing the bracers have over the chain shirt is that they are force effects, and therefore are useful against incorporeal touch attacks (which may be more or less useful depending on your DM's predilections).
Ultimately, the twilight + mythril chain shirt/bracers of armor/(greater) mage armor debate doesn't have a good, completely generic answer that everyone will agree on. Choose whichever is best for your character, or most commonly available in your game, and what looks cool. It sounds like mythril chain it is for you.
By the way, I don't believe that you can enchant robes like armor. They use the same slot, but are not the same thing. Someone correct me if I'm wrong.
On another random note, a mythril buckler is (almost) always good for arcane casters. It's a bargain at about 1,100 gp, or 2,100 for a +2 shield bonus. Plus, you can put a heavy fortification enchantment on it, and it sounds like it would mesh pretty well in your image of your character.
-Elemmakil