@macg19 I had just the opposite experience with Rogers High Fidelity. I found Roger to be very nice to deal with. I called, worked out a deal and that’s was it.
Having tried several other intergraded AMPs the Rogers the KWM-88 keeps on keeping on. When their AMPs are on ebay bay a call will save 13% and sending a check another 2%. Web site even says to all. After several years the amp was upgraded to run KT-170’s. More info on these fora.
The lifetime warranty is for AMP’s purchased (new, demo or used) from Rogers. I don’t think lifetime warranty travels with AMP’s when re-sold.
With efficient speakers the Don Sachs/Lynn Olson Blackbird mono blocks made by Spatial Audio Lab have a waiting list for a good reason. They are 300B Amps.
Lamm Industries (requires winning the lottery)
Oswalds Mill Audio (requires winning the lottery again)