Congratulations on your new frame! Building the bike will be half the fun.
Here is my bike for riding around my flat city of Toronto. I changed out a few parts.
Compass Chinook Pass 28 mm tires
White Industries pedals with Bruce Gordon half clips
Dura Ace Cassette 11-28 tooth
Specialized Avatar 155 mm saddle (I use this one on all my bikes).
Blender for my Garmin 820
To put some things in context, I am kissing 60 years of age, so I am not looking for the lightest and fastest bike. I want comfort which this bike brings in spades.
Next upgrade, sub 1400 gram carbon wheels, which will knock one pound of the whole bike. Looking at Bontrager Aeolus XXX 2.
Winter has arrived so I won't be riding for the next five months, which is a long time.