This is a really old news.
The F-16s Poland bought are the newest model of F-16 called Block 52+ Those planes are have better avionics, elictronic systems (the computer system in those planes are identical to those in F-22), as well a an extended range of operations.
Even the US has only a relative small amount of those planes (compared to the whole number of fighter planes) and beside Poland only Israel and Greece uses them.
When it comes to selecting this plane in the first place then it won the the competition against
Jas 39 Grippen
and
Mirage 2000
the Mirage is a realy crappy plane compared to those, so the competition had been realy played out between Grippen and F-16. Grippen is a newer construction than F-16 and is far cheaper in upkeep (for example it reqires a far smaller ground crew than the F-16) but it lost becaouse Locheed Martin as part of the deal had promised to invest 4 billion dollars (the amount of money the Polish government purchased the planes - at that time it was also the largest single arms contract ever made in Europe) in Poland. The Swedes weren`t able to do the same.
But that was a couple of years ago. Today Locheed Martin is producing jet engines as well as other products (in the future probably whole fighters) for American fighters in Poland.
Today there are talks about making a similar deal with Sikorsky.
As of Today the Polish Airforce is also equiped with Mig-29s
they are as good as the F-16
and Su-22s - which is a figher/bomber
Untill 1999 Poland had also its own fighter/bomber program. The PZL-230 Skorpion
But it was canceled becaouse of lack of funds.
The newest construction of the Polish Areospace industry is the PZL W4 chopper
that enters service in the Polish Army and Airforce this year.