A319 or 757? I'd be looking at the best 2nd-choice seat as being relevant here, and if row 6 was available on the A319 vs a normal non-exit-row seat on the 757, it would be an easy choice for me (row 6!). I also seem to be one of the few who notices the extra 1/2" width of the Airbii seat, even though I don't "need" it.