Islandear,
First, I'd like to say that I appreciate the quality of your post and the manner in which you wrote it.
I don't know any more about the situation than you've given us here, but I'd make a suggestion to look at and understand the different perspectives one could take when looking at this dilemma.
On the one hand, there is a manufacturer who made a unit, brought it to market, covered it with a warranty for a certain time period, and would surely like to sell more of the units. You've presented a unit that had a mechanical failure, but the warranty has expired. The position of the manufacturer is understandable: coverage for free repair is over.
On the other hand, there is your perspective: you're upset about the failure, you've been in high-end for a long time, and you think that your level of involvement entitles you to special consideration beyond the warranty. That's understandable, too, up to a point, but at what point in time would these considerations expire?
In other words, perhaps you are both right. The trick is how to reconcile the two perspectives to the satisfaction of both parties.
The piece of information that may be missing is the answer to the question, "Why does the manufacturer insist on replacement instead of repair?" Is the mechanical failure so heinous that it simply can't be fixed at all? Could there be another reason that they insist on replacement instead of repair, a reason that we may not be aware of at the time?
From all you've said, I think that if the warranty has expired and a replacement is required, then take the hit. If I bought any piece of equipment, whether it be a stereo component or a washing machine, if it breaks and the warranty has expired, I would expect the manufacturer to charge for the repairs or replacement, regardless of any special privilege I feel for being on the playing field for a long time (I've been washing clothes for years and years! I don't expect special treatment from Maytag.)
Of course you're angry; this kind of situation is annoying and time-consuming in the extreme. You seem angry enough to want to do something about it. But for you to make this situation and your outrage public would likely be unfair to the manufacturer, from the little I know. Would going public with your anger make you feel better about it? It might be good to ensure that you have a "leg to stand on" with your perspective before you get up and shout about it.
My $0.0175 (adjusted for inflation.)
Rob