Tire Options for a 35d

[Edge647]

I've started to "think ahead" for tire needs...I'm going to need winter tires (since I'm in Canada)

So when I place the order, I understand can get the standard 18's or 19's (need to get the sport package).

My questions are:

1. Are the all-season 18's good enough for winter? Can I just get summers?
2. If I get my own 19's or 20's...do I need the sport suspension (in the Sport Package)? What would the ride be like on a softer suspension if anyone has tried it? Recommendations?
3. Should I just get the Sport Package and get real winters?

Thanks in advance.