I usually don't respond to these posts, but here goes.
Final replacement - New SR-440HP radios now use mosfet finals, replacement is easy and inexpensive. The older models can use the SD1446, which costs about $14.
Receiver - There are a few forum members that have experienced excessive receiver noise. Their radios will be at our warranty shop next week, I will post results as soon as they are available. The bottom line is if you have problems, we'll stand behind our product.