Stick a dastana and char-aina onto it. (or however those OA things are spelled)
Celestial Armor, DMG specific magic armors section.
Ah, I need to be more specific. It needs to cost less than 1350 gold, which means Celestial Armour is probably out.
@TML: Dastana is a good idea, if I end up with Leather, a Chain Shirt or Padded armour, because +1 AC (That stacks) for 25gp is ridiculous.
Does anyone else think that a 16500gp light armour, with a +4 bonus to AC, a +6 Max Dex and no armour check penalty, oh, and a +3 unnamed bonus to Charisma-based checks 1/day (For 3 hours, so long enough for almost any social encounter) is maybe a little strong? (The Admirals Bicorne is what, 51000 gp?)
A mithral chain shirt is 1100 gold, and gives you +4 to AC and has +6 DEX bonus with no check penalty. Add the dastana for an extra +1 for 25 gold.
Dastana also has -1 ACP, and only stacks with "padded, leather, or chain shirt armor."
The Chahar-aina is 75gp and adds an ADDITIONAL +1 to armor, that stacks with "padded, leather, or chain shirt armor." needs Med armor Prof
Stick a dastana and char-aina onto it. (or however those OA things are spelled)
It should be pointed out that Chain Shirt, Dastana, and Chahar-aina is probably the best armor in the game. Especially when you start enchanting them.