I'm going through the struggle of trying to decide on a new preamp, and whether to go with a good tube or solid state. This all based on what I've read about mating a good tube preamp with a good solid state amp to get the best of both worlds.
I'm a little skeptical of the stuff I read on the huge sound differences between equipment, especially electonics -- it's rather subtle differences that I heard when I got my last amp and preamp -- while some of the descriptions I read would lead me to believe certain equipment would introduce me to an entirely new piece of music...
I've noted that when I attended a lot of classical concerts, my subjective involvement and appreciation of the quality of the music depended greatly on my internal emotional state and expectations. Why wouldn't that also take place when I listen to recorded and amplified music? I have noted my subjective judgement about the sound quality of my own system varies at times.
I think I suffer most from "audiophilia nervosa" when I'm about to make a purchase decision, rather than my day to day listening. I want to get the best value for my money, and become obsessed on the equipment. When I get it I sometimes wonder if the upgrade really got me that much more improvement in sound quality. Of course I have to rationalize that it did, since I did lie down that big wad of money.
I think I may be happiest with my system when I have the least amount of disposable cash. Means I'm a true American consumer I guess, and it keeps all these great companies in business.