Budget Tube Amp (newbie)

  +1 for the Rogue . Also for Dynaco , but I’d opt for the Bob Latino ST-120. This amp will handle KT-120’s , but you won’t need that much power . Between Rogue , Dynaco , or whatever , run NOS driver and modern power tubes . Also your Yamaha has Pre Outs. With just an extra pair of RCA’s you could place a tube amp on the Yamaha and still use your phono input and tone controls . I did this with a vintage Marantz receiver ahead of a pair of Dynakit MK III’s. Worked fairly well , but I was just experimenting. Also personally , I’ve enjoyed a quiet SS pre ahead of a tube amp more than a tube pre ahead of a SS amp . However there are many great combinations that way too , just my personal experience. I had the small Advents , not the large . I drove them with a little Dynaco SCA-35 and it was SWEET !  I then turned left and ran JBL L-26’s and ventured down JBL Avenue, never to return to Advent . But the JBL’s are hard and edgy and take tons of power . So don’t go there . Cherish your stuff ( wish I still had mine to enjoy . BTW, I gave 3 old systems to my kids , #1  Sansui 9090/JBL4312/Schiit DAC,  #2 Sansui 7070/ Klipsch Heresy II’s/ Schiit DAC, #3 Marantz 2223/Klipsch Kg 1.5’s/ Pioneer PL117 TT. I traded my Dynakit modded MKI III’s for a heavily modded Thorens TD 116 MK II with a Sumiko . And I live with just a 12 WPC Had Inspire 😝. Cheers and happy listening , Mike . 

What about a deHavilland ultraverve tube preamp serving a good solid state amp. I have the Ultraverve preamp and a Bryston power amp.  Wonderful depth and tone with no harshness or digital coldness.  

cayin
everyone here knows, i am cayin's biggest fan. So I;m going with Cayin. Now as to which intergrated,,,thats your choice,,I can tell you the MT35 is too small for your Advents. maybe start cking the MT45, work your way up. whatever you can afford. 
what is your budget?

I'll pile on to the Jolida recommendation.  I've used a 502brc (60 watt) for a long time and it sounds great with my Snell Type D (~87db sens.).  Has some nice tube warmth but not too much.  More than enough power unless you want concert level rock or metal.  Basically plug and play, easy to bias.  Paid $700 used maybe 10-11 yrs ago.  Unfortunately, don't see them around much anymore.  

I recently received a few emails from Roger Modjeski about his RM-10 tube amp. Both the original and Mk.2 versions of the amp are rated at 35 watts/ch, but the first 15 of those watts are produced with the amp operating in Class A. The current version (still identified as Mk.2) is rated at 25 watts/ch, the amp now operating in Class A to full power. So, if a loudspeaker is sensitive enough to draw only 15 watts, the older versions of the amp will be providing it with Class A sound (pun intentional ;-) .