Giant bowery evolution

seeing that last pic, you could do the following:

• keep seatpost, send the saddle a bit (~0.5cm) further back
  
• lower saddle by ~1.5cm and level it
  
• buy deda streetissimo bars
  
• slamdatstem
  
• if happy with position, chop steerer
  
  

imo, a cortissimo stem would seriously mess up the front end (both looks and functionality-wise). by keeping the stem, steering properties would stay the same and adding the streetissimo would get your hands to the same height as with the ton of spacers you have (hence the slammage).

also, a really personal opinion: silver rims won't look as good as black ones as the frame is not that classic-looking.