I haven't skied the RC and I am not sure where you get the info that it a replacement for the 5* they were both being sold at the same time ,(that would be the 5* titanium). I also don't really notice if the ski is especially stiff ,to me it has just the right amount of forgiveness ,but I am a little heavier at about 210+/-lbs. In regard to the bumps ,it depends on the size and the conditions.I don't hit the bump head on but try to carve the top side
to scrub some speed and drop in nicely for the next one ,with the skis you were mentioning they might be a little more manageable in the bumps but not by much . I don't know which atomic sx you were thinking of but that series from atomic and the RX-8 are very excellent skis and are going to be a lot
better than your sollies. You should be happy with any of these ,ll good for the east.The racetigers are not meant for bumps,if that what concern's you most go for the more all mountain ski which is going to give you versitility but
you should definetly give some race skis (not the race stock) a try if you mostly are sking in the east. good luck!