I'm planning on buying a used H/K 430 receiver. I always hear good things about Harman sound, and I wanted a receiver with 2 way serial control. Doing research, I don't see a whole lot of threads about it (which I believe is a good thing) but the few I do see all have the same problem: (usually) after a few years, the receiver begins to randomly shut itself off. I also see the disaster that was the 254/354. Is there a known bug with these AVRs? Is it a quick fix at a service shop? If anyone has any info/warnings/support for this receiver, please let me know. Thanks.