Oh wow I was going to go with QR Superform, softride and P3SL (Aluminium)
Cervelo P3C - basically The bike standard for may pros and age groupers for a decade.
Softride - epitome of the tri-specific bike (honorable mention to the Zipp beam bike)
QR Superform - tri-specific geometry (vs, just putting aero bars on a road bike)
