I'm going to have to agree with Willakan on this, it's personal preference where to draw that line. For you, it may be true, but I've heard $5000 speakers that absolutely bowled me over and wouldn't hesitate (if I had that kind of dough set aside for speakers) to pick them up. Just like some would think you're stupid to have $300 headphones, if it sounds good to you, it's worth it.
I'm an objectivist when it comes to audio, so my ideal amplifier would be a helluva lot cheaper! I'd probably have a Benchmark as my preamp also, and would laugh heartily at anyone who claimed my setup was unmusical. There are lines of diminishing returns and as far as amplifiers and DACs are concerned, we've prettymuch hit them. Who is going to be able to hear the difference between 0.0005% and 0.000005% THD?
"I don't care how it sounds, more than $5 on headphones is retarded."
It is simply a matter where each person draws the line of diminishing returns. Personally, I would put a lot of value on a stereo which can provide a reasonable "I'm there" sort of feeling. My headphone setup is very pleasurable to listen to, but I couldn't really fool myself into thinking the performers were in the room!
EDIT: Just looked up the amplifier you mentioned. If I wanted to add 0.1% THD to my sound, instead of using antiquated technology, I would do it with digital signal processing, grab a cheap, neutral SS amp and save myself a bomb. The Carver Challenge makes for interesting reading...
I was joking, I just found the most expensive one I could in 2 seconds on google. I wouldn't spend a quarter mil on those speakers I suggested either... That wasn't really clear in my post at all, sorry about that.