I just found this thread and want to chime in. I am one of those "returning" Odyssey customers. I had a stereo Kismet in Khartago case a few years back and really enjoyed it. I compared it to an AVA SET120 which is considered a sound staging champ. I thought the Odyssey was at least the equal of the AVA but I didn't need that much power so I sold it. Fast forward to today and I have a pair of Magnepan 20.7Xs. I had some 225 watt mono blocks (I won't name the brand) and they nearly melted with the heat they generated driving the Maggies. I reached out to Klaus and he set me up with the latest version of the Kismet Monoblocks. The sound with the Maggies is all I could want, I really like that big soundstage, I don't need 1,000 watts as I am running the Maggies with 4 KEF KC92 subs crossed over at 80 hz. I can understand why many Maggie users drive them with Odyssey amps. They run cool and don't run out of steam. I am very happy with the Kismets but am going to trade them in for the new 2 chassis amps as soon as I move in June. One comment I will make about buying used and getting them updated. True, they can be available on the used market for a really good price. There are so many variations over the years that I thought it made sense to buy the latest and greatest from Klaus rather than getting something that might wind up costing as much or more to bring up to date. Just my opinion but it is always useful to speak to Klaus, the man!