Aww come on, eh? Canada's not so bad, ya hosers!
I'm not sure if they check SATs at our Universities. I know there were people in my class that wrote SATs so they could apply to US colleges. We have APEF (Aptitude Provincial Examination something or something like that) instead of SATs but I think they serve the same purpose (although we never actually get to see our marks on them. Only the government can). Anyways yeah I don't think they check your SAT scores, just your final marks in the courses you took.
As for the rest.....well what are you planning to do? I mean there are some that have great arts related programs and others have good science ones. As for Guelph, can't help you because I know nothing about that University but here's a link to some info on Canada's universities and to their websites.
http://www.aucc.ca/english/dcu/universities/index.html
About well known ones, well I'm from Nova Scotia so I don't know about many places outside of the Maritimes, but Dalhousie (Halifax, NS) has always been known for a very good science program. McMaster (the place I'm going to in Hamilton, Ontario) has a good Arts & Science program. There are probably lots of other good places but I don't know much about them

. Just in case you wanted an alternative to just staying in the US.
*sees FBI goons at his door*
Uh oh
*puts on toque and runs out igloo in lumberjack outfit*