I have a ferplast 120 and it's pretty good! Though I had 2 females in it last time. There is plenty of space for 2 hides, a tunnel, 2 bowls and 2 water bottles. And then space to run and chase so that should be sufficient. But it's easy to want to pack out spare space with more furniture so be economical to make sure they get some leg room!
If the boars are only young it will be plenty of space, if they are adolescent they may scrap a little, if they are more mature, the space should be fine. As long as you remember that no matter the size of the cage it is always good practice to give them a change of scenery and take them out for playtime every day for a couple of hours if poss.
Ever thought of C&C? I have a 120 but I'm thinking of converting. The ferplast is probably better if you have lots of stuff going on/other pets because it stops stuff falling/dropping in the cage, otherwise C&C has better customisability and you can add more rooms to it if you get any more money/space.