Looking good!
Things to do now:
Change to fixed, lose rear brake, angle seat properly so its level/doesnt poke you in the bum-bum, ditch inner chainring, chop bars narrow/shoulder width to squeeze through sweet gaps in traffic, get some clips & straps on the pedals, matchy-matchy handlebar grips. Don't worry about changing headset its pretty much the least important bearing on the bike (in terms of quality needed).