Well, if you have the room and enough hens to go around, then keep them. My personal opinion is that roosters are not only fertilizers of the eggs, but the daytime protectors of the flock. As long as they're not viciously attacking other chickens, being viciously attacked themselves, or attacking other animals and/or people (especially their owner!), it shouldn't be a major problem.
I currently have 3 Silkie chicks ( 9-11 weeks old) in the brooder, two of which are roosters. One minute they're bopping and chest thumping each other like maniacs, the next minute they're cuddling up to each other for a quick snooze.
Just remember that if you decide to keep them, when you introduce them to your other roosters make sure they are separate from but visible to each other so they have the opportunity to work things out before the actual physical introduction.
I currently have 3 Silkie chicks ( 9-11 weeks old) in the brooder, two of which are roosters. One minute they're bopping and chest thumping each other like maniacs, the next minute they're cuddling up to each other for a quick snooze.

Just remember that if you decide to keep them, when you introduce them to your other roosters make sure they are separate from but visible to each other so they have the opportunity to work things out before the actual physical introduction.