Thank you all for your response!

I've looked into both flights. The exit row seat on the A319s is already taken, so I decided to connect in Miami. The 767 has a more comfortable seat and a tv (plus, it's 2-3-2 instead of 3-3). I don't think MIA should be that bad on a Tuesday at 4pm.

I don't think I will be allowed into the Avianca VIP lounge since my connecting flight is on AA in a different terminal. Can anyone confirm this?

Thanks!