You will so LOVE your cream legbars! :O)That's a real picture. "Brahms" was the most personable chicken I've ever had. He had short but memorable life. I had to cull him at 10 months; was hit pretty hard with the M.S.
I ordered two pair of cream legbar from Jordan Farm. Should have them by the end of June.
As far as Marek's resistance. I think bantams are less affected than large breeds. There is a resistance factor that some birds carry and this can be bred for selectively, but I think you need to blood test to see which chickens are carrying it.