Of the two Westins in Toronto, this is my preferred spot. I've stayed here twice and while it's outside of the downtown core, this location is quieter. I'm a curmudgeon so I like feeling like I'm in a quiet area. I stayed here a few months ago but my memory is already failing me.....parking was ~$15.
I can't really recommend a floor. The view is of city buildings in every direction.
Plus it's near the suburban Koreatown area of Toronto so I like the proximity of yummy restaurants too (there is a smaller downtown K-town too). Across the street is a large Korean grocery store (Galleria) if you are itching to stock up on food items or eat at their impressive food court.