Move On Up, For A Price
The BMC Race Machine RM01/Shimano Ultegra Di2 Complete Bike is certainly a race ready rig. The setup I had was SRAM Red and the doubletap shifting too a bit to get used to. I also didn't have the greatest testing platform for riding longevity as my only options were sheer climb and descent.
However, the amount of steering that I was getting and the minimal amount of road reverberation that I got made this rig impressive. I was also in-between the 53 and 55 sizes (5'11"; 180lbs; 34" inseam). The 53 pounced a bit more on the turns and climbed a bit better, but the 55 carried speed better.