I am trying to decide between 105 and Ultegra Di2 shifters for a new build.
Ultegra is $500 for a set of shifters plus calipers, 105 is $360.
I don't need all the extra features of Ultegra like hidden and satellite buttons, but it does have Servowave which reduces the lever pull until the brakes bite.
Is this worth $140 more? On 105 what is the normal amount of lever travel before the pads bite?

Thanks