It's been plaguing me for ages.. that BH-55 is just so sweet looking, and I love the second drop slot. I have a Markins M20 and that thing pans absolutely perfectly. Just enough drag, but still silky smooth. I can take or leave the location of the knobs, and the tension adjustment is probably just as good on the RSS. I don't do a lot of hiking so the weight difference is of little concern. So, let's hear from those of you who have had both. What is your impression..mainly of the panning action on the RSS. If you moved from the Markins to the RRS, were you happy? If you went the other way, do you miss the Markins?? I might look to do a swap of ball heads just for a change of pace..