Hello Lance. I would recommend the rc-62 to go with your rb-81's, they are matched for each other. A couple of years ago I bought a rc-35 new for $125 off of ebay and it was a great deal but something just didn't sound right, I replaced it with a rc-52 and I thought it blended better. Later on I found a RC-62 and I'm very happy. I think you should spend a bit more for the matching series, it will be much cheaper in the long run.