Wow, this is a long thread.  I wasn't planning on keeping a rooster for my flock (now 10 weeks old).  But I have an EE rooster with a pea comb.  From what I've read here, if I keep him and cross him with either my Welsummer or Black Copper Maran hen, I should get olive eggs, correct?
It may be worth keeping him.  We are new to chickens, but I selected breeds that would give me a variety of egg colors because I just love the way they look.
Robin