My take is variety is very important in this hobby. No matter how good your equipment is, hearing the same sound day after day can lead to desire for something else. It's human nature.
To use a slightly different analogy, I was born and raised in Chicago. When I really got into classical music I became a subscriber to the CSO which is a world class ensemble. However, I noticed after about 3-4 years I really began to look forward to hearing visiting orchestras because they had a different sound. Not necessarily better, just different. I think the same thing holds true for audio equipment. My answer to this issue of variety is to have two sets of speakers and a lot of different tube amps. I think this allows for sufficient variety and keeps me interested over time.
To use a slightly different analogy, I was born and raised in Chicago. When I really got into classical music I became a subscriber to the CSO which is a world class ensemble. However, I noticed after about 3-4 years I really began to look forward to hearing visiting orchestras because they had a different sound. Not necessarily better, just different. I think the same thing holds true for audio equipment. My answer to this issue of variety is to have two sets of speakers and a lot of different tube amps. I think this allows for sufficient variety and keeps me interested over time.