I'm running them now on an older Pioneer receiver (can't remember model) which has switchable impedance. They work very good but wish the center channel was a little bit larger due the room size I can hear it's limitations. Currently they're running w/ an Infinity 400W amp, and the combo sounds just a good if not better than the original Klipsch setup. Now I need to figure out what to do w/ the control pod & subwoofer. I'm still thinking about repairing it for the heck of it since all it would need is the Bash chip.
Thank you for your reply, and sorry for the late response. It's been a very busy month.