I've always been stuck on the Speedmaster with the black engine, but I have seen some nice BA's on this site with the gray engine. So do you SM owners find its hard to keep the black engine clean? Also, after reading another post on here, some of you think the 790 motor does not feel that much different than the 865. What is your opinion about whether the extra cc's are worth it? It would be cheaper to get an earlier model BA than a SM.
