Transistors don't transmit, they modulate. Therefore what follows is a representation of the original input signal, it's not the input signal itself amplified. Tubes amplify the signal itself. That's an important distinction. Furthermore, tube circuits should have less components in them to screw up the sound. Obviously tubes have their own issues, but only the best of the best solid state circuits can compare to tube gear that you can buy from small manufacturers for a fraction of the price of the high end transistor gear. Just stick to octal tube gear. All that said, it would be unfair to not recognize the improvements in solid state of late. High speed demands are raising the bar for passive and active devices, therefore semiconductors are getting better and more accurate all the time, but for now the best bang for the buck is still tube equipment. It's just too bad that it took me decades to figure this out!