I hate doing this but:
------PLEASE READ GEORGE---------
Honestly none of those really appeal to me George

. However, if I HAD to choose, and thinking about you as a developer, I would say CYUL makes the most sense. on VATSIM there is a HUGE amount of tfc out of Canada at times, so I guess CYUL. However, look at KMIA on Vat-Spy at about 6pm est on any day. That might appeal to you

(You get my drift hehe). Intersim will be done by the time PMDG releases their 797 so I dunno. However, I think based on what you guys have been saying, that is more a Martin airport (since he is geographically closer to get pictures for himself along with others)