I have a pair of RF-3s, and have enjoyed them for years. I purchased a Denon PMA2000ivr intregated amplifier which is outstanding. I thought maybe it is time to upgrade and started to look at the 63s and the 83s. From the forum, I gleened good vibes from a Klipsch employee about the 63s, and am about to hunt them down. Also from the forum, I can not find any raves about the 83s. I love the sound of the RF-3s, but am going crazy trying to decied. I heard the 83s and they sounded good, but I was not blown-away.
Maybe no one can help me with this just sharing how hard it is. Merry Chistmas.