Sexiest bike I have ever seen is Thomas Voeckler's Colnago C59,
http://velonews.competitor.com/files...18-631x421.jpg
http://velonews.competitor.com/files...41-280x421.jpg
http://velonews.competitor.com/2011/...ttachment/15-3
The best looking bike you can get has to be a Noble BMC Impec with Lightweights and Campy SR 11 EPS.