I don't understand why we are restricted to these choices only. Why not other considerations - it would not be subjective at this. There are quite a few international airports in North America. Choose whatever International airport you wish . . . . . . .
I think the overall post is for International airports outside North America, but By North America do you mean USA or Canada and Mexico Included in that post?
For USA there is already an unofficial post for people to chose airports from.
For Canada, FSdreamteam have done Vancouver for FSX and Jonathan Gabbert Vancouver for FS9 (Available at Avsim) while Fly Tampa have just completed Montreal for all Platforms.
While Mexico has great representation from Taxi2Gate, LatinVFR, Bajasim and Tropicalsim doing a variety of international airports in that region.
Regards