Golden Comet doesn't tell me that much, just that they are red sex links. Some are the commercial egg laying hybrids, bodies about the size of a Leghorn and not much meat. They are designed to produce a lot of decent sized eggs and have great feed to egg ratio. With them being that small they don't need much feed for body maintenance.
Others are actual crosses between dual purpose breeds. These are basically dual purpose birds. Do you know which hatchery yours came from? We might be able to tell which ones you have by looking at their website.
The commercial egg-laying hybrids are not likely to give you good meat birds no mater what rooster you use. The dual purpose crosses will give you much better results.
If you read through the posts in this section you'll see that we all have out favorites for our own reasons. Some like the Naked Neck or other breeds that don't feather in thickly, fewer feathers to pluck. Some like the true Cornish (not the Cornish Cross) because it increases the amount of of breast meat but they are typically poor layers. Some like a white or buff color because you get a prettier carcass when you pluck compared to a dark colored bird. Some like certain breeds because they feel they give a better texture. Some try to incorporate Cornish Cross or Rangers, the true meat birds, but those typically require a lot of work and aren't always successful. Rangers are easier than the Cornish Cross.
To me there are a lot of different qualities that might make a good meat bird. I don't know what qualities you are looking for. My main suggestion is when you decide which breed you want to try, get a bunch of them, especially if you are getting them from a hatchery. 20 is not a bad number. You'll find that some are much better quality than others, the more you have to choose from the better rooster you are likely to wind up with. Eat the ones you don't want to eat and breed the one you most want to eat.
