I posted a message on the Klipsch Message boards on the forum "Upgrading Older Speakers", and I was pretty much shot down. Apparently, you need 30 year old speakers before anyone will even talk about upgrades. Apparently, I would be messing with the delicate balance of the universe or something...ANYWAYS.. I have a set of RP-3's. These are similar to the RF-3's, except for the built-in 10" subwoofer firing from the sides. My problem is, the drivers Klipsch used, imho are not up to the task. They bottom out pretty easily and can't handle LOW bass at even normal levels. For example, at a volume where I would normally listen to movies, the opening scene in Toy Story 2 makes my subs sounds awful. They pop like they are bottoming out. They probably are. What I want to do is pick up two of the 10" drivers from Klipsch from their RSW-10. These are their cerametallic drivers and are probably better drivers all-around. Am I insane for wanting to try this? Am I going to ruin the dynamics of the speakers if I try this? It sounds reasonable to me.