I couldn't cope with the difference between how Fabian's Domane looks in H1 geo, and what it looks like with the endurance geo. I'm sure it's perfect for audax, but with the towering headtube, the short top tube, the gappy rear triangle and the bent back front dropouts, the Domane looks like a Dutch bike with drops that's been ridden into a wall. I can't look at one online without wanting to adjust my monitor's aspect ratio.
All that, but really just that the Madone 4.5 has the Radioshack Leopard Trek colour scheme (which allows me to channel Jens), so I coveted it.