Back in April when I was looking at boilers it was between the Harman 3ooo and the Keystoker KA-6. I almost orderd the Harman which at the time was $500.00 less than the Keystoker but the 2 main reasons for going with the KA-6 was 1 None of my local Harman dealers had any knowledge about the boilers and they have never even sold one. 2 You can't contact Harman directly with any Technical questions, you have to go through your dealer(who doesn't know anything about the product). Who knows how long it could take to get a responce back, you would think that a dealer should be somewhat knowledgable about the products they sell.
When I called Keystoker, I actually spoke with the owner Jim, not to many companys now a days where you can still do that. The local Keystoker dealers were very knowledgable about their products were able to answer all my questions. For me the extra $500.00 was worth the customer service I knew I would get down the road, especially because I knew absolutly nothing about boilers and burning coal. Of course that's before I found this forum and since have learned a lot about both. I'm sure the Harman boilers are excellent, but for someone like me who has no knowledge of boilers
I felt more comfortable buying the Keystoker and knowing I could call my dealer with any questions, which I already have a few times