What if you rephrase your original post?
When you look at my virtual system, what can I do, short of buying a tube power amplifier, to get more of a tube like musical experience? My budget for such a change is $xxxx.
Also, rather than “as good as tubes”, maybe you could let us know what specific audio characteristics would constitute “as good as tubes”. I mention all of this because there are probably many aspects of your system that could be upgraded to move you closer to your goal. My digital was greatly improved with changes in streamer and DAC. I am a believer in hybrid systems and for me it is a hybrid integrated amplifier.