yes we've booked Shirley Wu for my sister's wedding as well. Hey even we're planning for my sister's wedding here in Toronto.
I guess we're in the same boat somehow.
As for banquet halls, there is chandni banquet hall in Brampton which is really good, then there is Woodbine like Sara mentioned, Sangam, Maple, Rose banquet hall.
For stage decor, am going to contact DreamParty decor, mandap. I've seen their work, looks pretty neat to me. All of these start at $1000, so it isnt that bad.
As for photographer, we've booked sherjan @transpose photography.
Am looking for a good videographer now, I know of vidjan but there so pricey. sigh.