Merle - Just in case you do have an opportunity to demo (which probably can be arranged through Jed Barber of Joule, if there is no dealer in your area), let me add that from the other posts, the Joule OTLs may indeed be a possibility for use with your Kharma speakers. I use them with Merlin VSM-SEs, the speakers Joule Electra is most often associated with, and the nominal impedance of the Merlins is 6.8 ohms. If your Kharma speakers are basically 6 ohms and fairly stable (i.e., don't drop way down at some point in the frequency spectrum), the Joules will work fine. All the amps mentioned have great reputations. However, if you are curious about OTLs, you should try to give them a listen. Their magic is not at all limited to the mid-range. On the other hand what I hear and love about my OTLs may or may not strike your fancy as much. At the level of all the amps being commented upon, "taste" probably counts more than anything.