I have to disagree with Fireblade that the Mirage 2000 is unproven and that it lacks manouverability. The Mirage 2000 has flown many combat missions both during Dessert Strom and during oparations over ex Yugoslavia, so it has been tested in combat.
As for manouverability I have seen the Mirage 2000 many times at airshows and it can turn as good as any other figther in my opinion.
It is true that the Mirage 2000 is an old design, but so a pretty much every other fighter in service today. What is important is what is under the skin. Most modern combat aircrafts can go around mach 2, pull 7-9 g's and so on. The different between a 3rd generation fighter and a 4th generation fighter is its ability to carry out different missions at the same time, that is Swing-role instead of multi-role. The first operational 4th generations fighter, the JAS-39 Gripen, differes not in airframe performance (speed, range ect.) but in the onboard electronics like data-link.
As far as I know the version offered to FAB is the Mirage 2000-5 Mk 2/-9 version, and after reading a bit about it in magazines and on Dassaults homepage (I know the is not totaly un-biased) I think that it sounds like a pretty good plane. It has state-of-the-art electronics and can carry a lot of weapons, both air-to-air and air-to-ground.
If you match the Mirage 2000 against the F-16C (I hate to compare to similar jets to say which is the best - it all depends on the situation - but here we go any way
) I would think the F-16C would have the upper hand in close air-air combat. At long range nowadays it is pretty much a question about how sees how first and fires a long-range AAM. The air-ground capabilities of both aircrafts are as far as I know pretty good, the F-16 might have a slight advantage because of JDAM bombs but I think they are pretty equal.
To sum up this all-to-long-thread (once I get started I tend to keep going - sorry) I think that the Mirage 2000-5 Mk. 2 is a pretty good aircraft that the Frence can be proud of (no I'm not Frence or a Dassault employee
-- Any spelling errors in the above text is made on purpose to reduce readability.......