Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

In my minds eye I've got the following drivetrain:

Alfine Di2 11 rear hub
Shutter Precision clutched dynamo front hub
Rotor cranks, P2M meter, belt drive

And then Hayes mechanical disc brakes with the Di2 levers.

all this on steel frame? did you think this through?

You don't like your Boardman so instead you are going to build a really expensive,
heavy bike with an soft, indirect feeling drivetrain?
You worry about the drag of the dynamo hub but you get an Alifine?
You get a beltdrive and electronic shifiting because you think that will not require maintenance
but then you go with mechanical discs?

Since you are a Princess and the Pea type cyclist I predict you will not even get through
the run in time of the Alfine before you hate it.