Options for replacing an old rooster

[Bigfish502]

Hey everyone, I have a bit of a dilemma. I have a rooster that is 4 years old that I would like to replace with some younger blood and I'm not quite sure what route I should take. I have 4 roosters that are his offspring that are 6 months old that could potentially fill the position. For context the rooster was the offspring of some birds I bought from Privett Hatchery. He was the only rooster in the batch that didn't have curled toes so naturally he was the defacto winner when it came time to replace his father who went blind in one eye due to an infection (none of the hens had curled toes). I ordered some new hens from Bresse farms and those became the mothers of the 4 roosters I have now. Strangely enough one of the roosters that was slipped into that shipment (Bresse farms sent me free cockerels along with my order of pullets) ended up developing curled toes and one of the hens had a blonde crest that wasn't like any other cream legbar I've seen. So with context out of the way I have a few options. First is that I keep the old rooster and hope he can continue to produce viable offspring. Second is a choose one of the young roosters to replace the old rooster and breed him back to the original stock from Privett Hatchery (which admittedly are reaching 4-5 years of age). Third is like the second except I order new quality hens to breed him with. Fourth is I eat all the 4 roosters and go out of my way to order a new quality rooster from a different farm to continue the blood line. Thus far I've been trying to select for a large body size in my birds so they can make for better dual purpose properties (the original father who lost an eye from Privett Hatchery was massive compared to his siblings). As far as temperament goes there have been a few incidents of aggression with this current rooster but they usually happen in the peak breeding season and are usually pretty predictable and manageable (his father would attack if someone approached too quickly on his blind side). Other than that he has been an excellent protector chasing off hawks that try to attack his hens. If I need to order new birds where would be the best place to receive high quality cream legbar brood stock? Any advice would be appreciated.