<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by AC_flyer:
I would say with regards to sizewise, new planes which will be ideal to replace the B737-200s will be the B717-200s, B737-600s or the A318-100s.
These will likely seat around 100 pax in AC's current configuration.</font>
I think the Airbus is good for 117 in an all-economy configuation.
Assuming AC would use these for two class service as well, you would have ten or more seats go out the door in a mixed configuration.