Yeah, COB penetrates deep as well. My favorite strains for big yields are Northern Lights by Royal Queen seeds. Very stable. Think different, Think Big, and Ultimate by Dutch Passion.
Critical by Royal Queen seeds must have great potential, but I've only grown it once and it was a freak of nature that got huge as hell. 2.8 pounds dry. Nugs so big I couldn't get both hands around them.
My favorite so far that has pretty good yields and just great bud is Dutch Passion Auto Colorado Cookies.