Quoted from tp:yea im really torn on this one.... facts....never played rbion but always wanted.... love congo would need to find another someday... money is an issue at the moment.... space is not however as i bought an old butcher shop to use as a gameroom.....got room for atleast 20 more if someone needs room to store their games
This kinda says everything. Keep Congo, and save up for a RBION.
Both are really fun games, but Congo is a personal favorite. That said, RBION is one of the best value-for-money games out there, and I wouldn't be surprised if that one ends up as my first Stern.