I paid full retail last year for a Defy 2 at $1130. It was a fantastic bike before it was stolen. I replaced it with a Trek 2.1, a decision I regret. I wanted the Apex components but the geometry of the Defy is second to none for my kind of riding. The Trek is a fine bike but there was something very special about the Giant and it won't be long before the Trek is replaced with another Giant. Seriously looking at the Defy Advanced with 105 and a new 12-30 Ultegra cassette. Even the new Defy 2 would be great.
You can buy a new Trek 1.2 for $650 but don't do it. The Defy will smoke the 1 series Trek in every way.