hi Van,
I think with an A319 rating you will find it easier to get a job. I did a 737 type rating and it was difficult to find employment as there are so many others like me. By looking at how many Airbus's are delivered each month compared to Boeing and you will see the way things appear to be going.
Basically if i could turn the clock back I probably would have gone airbus.
Whatever one you do, work as hard as possible and with excellent reports from instructors etc, I dont think you will have too much trouble. Remember though that most summer recruitment has been concluded now, so be careful as to when you decide to do this. I think a good time to start a type rating is around November, as when you finish you are in the thick of it.
Hope some of this helps.
and....rotate