It's easy to get obsessed and drawn into the law of diminishing returns. There comes a point where spending a fortune only makes a tiny difference to the enjoyment of the sound. This will be highly controversial but I am of the opinion that it is possible to put together a system (used, of course) for way under a grand that will be 99.9 per cent of a 10 grand system. But that's where the obsession comes in - trying to find that extra 0.1 per cent. Personally I prefer to just relax and enjoy the music and not worry about that last 0.1 per cent, I can fully understand those that want that last bit though. Maybe it's because I am self employed and don't have that sort of money to throw about, maybe it's because I have so many other things to spend my money on.
Rob is spot on though, we buy and build systems to please ourselves and to listen to our music - nothing else matters. What may be theoretically right or wrong and whatever theories may have sound scientific foundation behind them the only thing that is important is how your system makes you feel when you listen to your kind of music.
Long may it continue.
Dave.