Recently flew SDQ-Newark on Continental. May I say that the Continental service is much much better than what you get on American. I am speaking of economy, so I would assume the Continental first class is far superior too. Maybe worth paying for.
I would not spend on flying first class on any of the American Airlines short routes. Total waste of money. Bulkhead and exit rows seats are the best option in economy.
No comment on Aeromar as I have not flown this airline.