Solid state for me, thank you.

The diodes not only lower the impedance of the power supply, but they are faster. This helps not only the bottom but adds a bit of clarity to the high frequencies. Also, with the diodes you can add more capacitance to the power supply, thus supporting the bottom even more. Tube rectifiers are limited to 80mF max.

"Tyranny, like hell, is not easily conquered… What we obtain too cheap, we esteem too lightly: it is dearness only that gives every thing its value. Heaven knows how to put a proper price upon its goods; and it would be strange indeed if so celestial an article as FREEDOM should not be highly rated."
-Thomas Paine