Maybe starting from the 721 or the 722 would be a better idea. I wouldnt go all out and buy a carbon frame as my first single speed. In fact, i've never owned a carbon frame. Buy something you wont't necessarily have to "baby" but will ride and love.

Nonetheless, it is your money and your opinion. Everything seems perfect. Perhaps experiment with handlebars-- risers, compact drops, bullhorns, cross brakes, hoods, etc. Consider clipless, toe clips, and platforms for your needs. Clipless gives you better power transfer and control at the expense of practicality (and the risk of falling over at a busy intersection). Platforms are easy: in, out, all in regular shoes-- but with lowered stability and power. Snug toe clips are a nice middle ground.

Archetypes are good. Continetal Gatorskin front/vittoria randonneur rear is a good standard. The rest of the parts is your choice, just make sure to use carbon paste.