Mike,
looks like a great bike.
I have the same Schmidt/Supernova combination which I just leave on whilst riding, it often gets commented on during the day so it is effective and great in the dark. I also have the Supernova rear dynamo light, rack mounted with a couple of Stagonset stainless P-clips to the rearmost rack bar (in place of the rear light plate), recommended in place of one of the LD1100s.
Adding a small battery front light will give you a complete set dynamo/battery front/rear for all occasions.
Make sure you get the Supernova gold connectors and a bar mounted front light so that you can remove it, otherwise at £200 or so some light fingered rat will steal it when you leave your bike unattended.
If you are mounting a bar bag then you have to fit it below the bar mounted light, extension bar at the bottom of any spacer stack, or put the light on a permanent fork crown fitting and raise the bar bag a bit.
The Supernova is the second best dynamo LED for lack of interference with wireless computers and I run mine with the light bar mounted to one side of the stem and a Cateye V-3 Triple Wireless to the other side of the stem. I had a Cateye CC-MC100W, although it worked alongside the Supernova it did not get on well with the rain in the UK.
Pump, I mount a similar pump in a pannier, it is small enough.
I added mudflaps to my mudguards, front one useful if riding in wet/muddy conditions to keep the drivetrain cleaner, rear one if riding in company.
I added a small B&M Star mirror which I find useful riding in traffic.
A lock may be worth adding to the list...
I opted for the S&S couplings and although used infrequently they are useful, even for just quickly splitting the bike to go in the back of a car.
If you get them then you have to allow for any rear light cables to be splittable (more gold connectors).
Julian.