Ok
Im from quebec city so i have a HUGE BIAS towards it.
I love it, i always have stuff to do.
Do you ski/snowboard? if so, fun factor just increased by 5.
Within 45 minutes of downtown QC you have
Mont Ste-Anne
Le Relais
Stoneham
then for an additional half hour you get the Massif of St-Francois river (tallest mount in the province, amazing view)
If not there are other things to look at. In february they have the Winter Carnival so thats something to look for, tons of restaurants on Grande-Allee st, Cartier st and St-Jean street
Youre gonna have to eat poutine at Ashton's
Go shopping at Place Laurier or Galeries de la Capitale.
Go chill at the Plains of Abraham
2 bigger museums to check out
etc etc
EDIT) and i do Brampton - Qc city in 8 hours. I stop once to gas up at exit 696 in brockville and keep going.
Sometimes takes me less time.
Its 800 km... so basically should be 8 hours unless you stop several times