Depending upon who you play is the answer to that.
I\'ll say this,the BF web page only accepts the display of BF miniatures.Where they sponsor a FOW event,I\'m pretty sure they only want to see BF miniatures.They are more like GW Fantasy/40k with their own system and models to use for it and probably would not allow other mini\'s.They are a buisness and have outgrown the small time \"it\'s a hobby\"area.They want to sell their stuff and make no mistake about it.That said,I still like the company and the folks running it are accessible and that\'s a bonus for such a large wargaming buisness.
Here is the good point,we live in Germany and are unlikely to attend BF sponsored FOW tournements ,therefore giving you a chance to try other mini\'s.Before bringing other mini\'s I would suggest you ask the tournement organizer or players you wish to have a game with how they feel on it.In most cases,I think folks won\'t have a problem as long as it looks like what your saying it is and the size is pretty close.The size and bases of BF FOW is important for targeting purposes and so you should all play with the same size mini\'s to level the field.I personally use only BF,but that is of course more expensive then some others you might have in mind.
Again,just ask and see how they feel.
Good luck and happy gaming.
