If only there were a way to figure out which ScareBusses have the "new" F seats. When the interior isn't falling apart (off topic, had a major roach issue on a flight from LIM-MIA-JFK) the experience can be nice. I'll take the Airbus over the 757 any day, although I haven't ridden in the back of one for about 10 years.
I'll be doing JFK-MIA-SJO on 12/15 (2171 A300)
and LIR-MIA-LGA on 12/21 (2130/2068 738/757)
Hopefully all up front.
If there is ever a place to not sit in the back, it would be flights to SJU...well, not quite as bad as SDQ