So damn hard deciding which tube preamp to buy!

 Mommy gone away.  I need to make decision myself. Am a big boy.

And so it (t)rolls on.

Sorry for taking time to get back to you on this.  Was with family at the beach.  
You want to have the right amount of gain, output impedance.  Get those right and the amp will sound great.  If you have too little or too much gain, sound will be bloated or thin respectively.  If the impedance is wrong, then you will issues.

this is a great write up.  
https://forum.audiogon.com/discussions/how-to-match-preamp-and-power-amp

I would stick in the mid teens, 12-18dB of gain with your power amp.  200/100ohm balanced/unbalance impedance range should be good for your amp.  This doesn’t need to be exact and some deviation is allowable.  

...uh, that 24 hr. 'drop the $ or Drop It' time limit blew away awhile ago....

Oh, I get it....she's off to the muther-in-law.....and you're about to die.

(You could go Real SOTA, and play with this:

https://korgnutube.com/en/

Best of both whirl'ds'?   Mmmaybe....;)...)

...oh, Stop.  Even Spock wouldn't make a face like That....;(

...it might 'stick'.

Oh, pardon....That 'is' Normal....my bad.....*snicker*