thanks all for your advice,
my commute is pretty short indeed , around 5 miles I would say and since i have everything in my office, i m not considering a heavy back pack, I already use small bags for the small stuff

i think the fitness bikes are usually ready for racks?
i havent seen similar bikes with with a drop bar(i may have mistaken them for more expensive road bikes though) it does sound like a good idea

my roads are mainly very good conditions, not even red lights since i work outside of the city but i think just to be safe i would put at least 32 tires .