Our governement is gonna buy new jets. It's a competition between the F-35, F/A-18, JAS-39, Eurofighter and the Rafale. I'm hoping we'll get the Eurofighter, but I assume we won't. But as long as we don't get the F-35, we're okay I guess. Only downside, today it was leaked that the requirement is made to match the F-35. Our minster of defense is a huge fan of the F-35...
F16 --> F18 isn't enough of an improvement to warrant a new plane in my opinion, so not too much of a fan on that one
F16--> Rafale: Rafale is decent and no-one wants to buy it, so the french are now doing anything to get at least a few sold. So with some luck, Belgium might get them so cheap that they are worth buying
F16-->Eurofighter: Might not be neutral in this since i'm a Eurofighter fanboy, but in my opinion it has all apart from stealth (huge payloads, good speed, good maneuvres, good detection). And stealth seems to be overrated anyway
F16-->JAS39: I guess the JAS39 is the plane that matches the aim of the F-16 best. A cheap multirole plane that can do what it has to do. So as replacement of the F16 in our air force, probably the best option
F16-->F35: Please no. I think i don't have a write a whole page here about the shittyness of the F35 and its insane costs. I'd honestly prefer to see our F-16s replaced by MIG-21s than F35s