Budget Tube Amp (newbie)

You can buy for cheap old counterpoint SA-12 or SA-100 hybrid amps and even get an SA-1000 or SA-2000 preamp to match for around $1K on eBay.  PLUS they can be upgraded to compete with some current models amps today when you are ready.

Happy Listening.

  +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.