Remap curved quotation marks in OS X?

So, the default key combinations to manually insert curved quotation marks (“” and ‘’) in OS X are:

• option + [ for “
• option + ] for ‘
• option + shift + [ for ”
• option + shift + ] for ’

Possibly due to muscle memory and the mental association with the keys ([ being an "opening" symbol and ] being a "closing" one) I find this specific setup very confusing, so I'll always get it wrong when inserting curved quotation marks manually. And have to try all combinations until I get the right quote.

What I would like to achieve is the (IMO) more intuitive setup:

• option + [ for “
• option + ] for ”
• option + shift + [ for ‘
• option + shift + ] for ’

What setting/file/app I need to fiddle with to remap these characters? Is there a special keyboard layout I can download that will do this for me? Thanks in advance.

PS: I'm aware of the "smart quotes" feature, but I'd like to have more fine grained control, that's why I want the manual insertion to be intuitive for me.

You can use KeyRemap4MacBook with a private.xml such as this:

<?xml version="1.0"?>
<root>
  <item>
    <name>Manual Smart Quotes</name>
    <identifier>ManualSmartQuotes</identifier>
    <autogen>
      __KeyToKey__
      KeyCode::BRACKET_RIGHT, VK_OPTION | ModifierFlag::NONE,
      KeyCode::BRACKET_LEFT, ModifierFlag::OPTION_L | ModifierFlag::SHIFT_L
    </autogen>
    <autogen>
      __KeyToKey__
      KeyCode::BRACKET_LEFT, VK_OPTION, | ModifierFlag::SHIFT_L,
      KeyCode::BRACKET_RIGHT, ModifierFlag::OPTION_L
    </autogen>
  </item>
</root>