Tim,
Welcome to Canada. While I am just one voice of many in this area, here are a few ideas.
Public:
Copper Creek Doug Carrick Design
http://www.coppercreek.ca/ Private golf club for a day affair.
Osprey Valley Heathlands or Hoot. Doug Carrick
http://www.ospreyvalley.com/Great golf and range, not much else.
Eagles Nest Doug Carrick
http://www.eaglesnestgolf.com/fore front/default.cfm
Golf on steriods. A very large scale project.
My personal favourite is Osprey Heath or Hoot. I believe GCA's own Ian Andrew worked on both.
On the Private side there are many very good offerings in the area.
Toronto Golf Club -H.S Colt
St. Georges - Stanley Thompson (maybe his best)
Devil's Paintbrush - Hurdzan/Fry
Weston Golf - Willie Park Jr.
For a great "Canadian" experience try to make a trip to Muskoka region and play some greats like Bigwin, Muskoka Bay and Rocky Crest. About 2.5 hours north of the Mississauga.
Enjoy.
Kerry.