amiga500:
I find the Jetstar A320 seat backs with the magazine and flight safety card 'bin' at the top of the seat quite good. It seems to give a bit more room for the knees.
But they have 29" seat pitch - that's a whole 5" less than the front seats on an Air NZ A320 international and 4" less than the front domestic A320. Air NZ's most cramped seats are only 30" down the back.