TCCD are made by Samsung. Most of the top memory uses these. The Ballistix uses Micron, but Anandtech tests put it right up at the top alongside OCZ. IIRC Crucial was best at intermediate OCs, OCZ at stock and heavy OC (Corsair were in the pack). I got Crucial for that, and for the fact that it was around £50 cheaper than the OCZ.
Since then there have been a bunch of other TCCD sticks by various manufacturers, but some you can't get here, and others are a bit of an unknown quantity. Note that any of them are very good though, real world differences will be slight.