I’m looking into getting a Vandersteen speaker.
Personally I would suggest that you would be happier if you got a pair ;)
I did that back in ~ ‘84, and still have them.
I found that one just didn’t image good on its own ;)
I have a PrimaLuna Dialogue HP hooked up, which sounds a bit hollow in the bass when in Triode mode, so I leave it on UltraLinear most of the time.
But I have some KT120s en route (and that amp is new to me). It has been fine on another tube amp and 2 SS amps… Not a huge difference that I can recall between them all. This biggest was the PL in Triode mode.
The newer 2Ce- Sig-iii should sound better than the older 80’s 2C, so just get whatever you feel will last you a few decades.
Also there are some CTs coming up used in San Diego area soon… (from what I hear).