hey there,
I just got back from Puerto Plata yesterday on the A330. You get the IFE on seatbacks as already mentioned!!!).
If you are gonna bring your own headset they have to have two "pins"if theats what you want to call them. I'd say the best place to sit is...anywhere really. I was seated right at the back of the plane when i went to puerto plata, and I had lots of room. The aircraft is generally quiet, so there shouldn't be a problem with the noise. The "premier class" isn't all that really, just green leather seats with HUGE armrests and lots of fruit punch!!!! lol
Have a safe flight!!!!