I'm anti-osgoode. I can't stand York.
On your other schools ... who really cares. I mean, Law in Canada is the same everywhere except for probably UofT, York and UBC. Anyone that goes to Mcgill will make a case for it but really, in my opinion, it isn't in the top 3.
As for the rest of the schools, they're all the exact same. So go where you want to study law and where you want to practice. UWO is a nice school and london is a great city. I don't like kingston too much so I'm not considering Queens. As per UNB or Manitoba ... i really have no idea because I no nothing about the schools. I went to Winnipeg and I didn't like it very much ... but that's me I guess.
Maybe look at UVic and UDal. With your stats you should get accepted and both have good law schools and are in amazing areas. I'm super in love with both of those schools (and UBC too).
I actually can't stand York. My GF goes there, and seriously, it is a hole. But this way I stay in TO which is a nice plus. Their tuition kills, however!
I lived in Winnipeg for two years. Let me be blunt: I didn't like it one bit. But seriously, free schooling is tantalizing. UNB is also hinting at basically free tuition
PS: Is it just me, or is Ontario really stingy with scholarships/bursaries? All the in province schools have basically said ZIP about money.