I would definitely avoid the roosters for several reasons.  First, roosters will crow, often and at all hours, and some neighbors will complain.  Second, the only really good reason to add a rooster to your flock is if you want fertilized eggs for hatching.  Third, unless you follow the recommended 1 rooster for every 10 hens ratio, a rooster can be very hard on your hens physically; over-breeding them, injuring them with their beaks and spurs, and battering them.  Fourth, even with 10 hens, your rooster may decide to mate with only his favorite hens, so you will still have some over-bred, injured, and battered hens.  Fifth, hens frequently lay better without a rooster as they are in better shape (for the reasons that I covered above).  I currently have 25 hens, no roosters, and I get loads of eggs without feeding any non-egg laying mouths, without the aggression, fights, crowing in the middle of the night, injuries, and over-bred and battered hens that frequently goes along with having roosters.   I know some BYC members will disagree with me, but I think your flock is better off without a rooster; the cons of having a rooster way outweigh the pros.  I end up responding to members threads, four or five times a week on average, who are having nothing but problems with their rooster.