From looking at your BYC Page, I see that you are not allowed to have roosters, so you will not be breeding your own birds to improve your stock. That makes it difficult.
I don't know your specific goals and intents. If you have not done so, I'd suggest you go to a few shows and talk to the people showing their chickens about your plans. I think you will find that most of them, or at least the ones that have a chance at prizes, have gone through several years of breeding to develop their own line to better conform to standards. I don't show chickens so I cannot speak from direct experience, but I'd suggest more hands on research by going to a few shows before you make that big a decision.
Good luck!!!