Actually, i wouldn't underestimate Chinese capability to mass produce defensive gadgets. JF10 is a better choice than F16 in my opinion. USA is far ahead with a F22 in the battle training and we're still drooling over a fighter that is 2 generations old.
Not that i know a lot about F16 capabilities, but still. Without upgrades, i'm not so sure how F16s perform head to head with Sukhoi.
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Good questions teggy.
You must google your thoughts on this and you will be amazed with the results. Anyhow SO MUCH has been said about this question on GS, I'm sure you can pull quite a few threads from archives. F16's are neither 2nd generation nor 1st they are simply the right 'fit' for PAF (ofcourse no match to IAF)
JF's are built on F16 capabilities under Pak-china joint venture with export (money earning) capabilities etc etc,,, I'm sure it not lost on you guys ?