Curious what kind of deal are you receving. I have owned the Studio 100v5 in the past, and I thought they peformed very well in their pricerange. I can only find measmurements for the v3 which are a pretty netural speaker.
I have not heard the RBH model you have, so hard to really say. I will say that despite the Studio's rated sensitivity of 92/89 they really opened up for me when fed them more power. (Parasound A21s). vs my receiver at the time.