If I like sound of Ayre Integrated I would Like...

I have a great sounding SS rig, but I can't help but wonder what the heck goes on in those little red glowing tubes in my secondary rig (Cayin A-50T). The sound is pretty sweet (into just B & W 685's). My next upgrade in my big rig was going to be the Ayre MX-R monoblocks but due to my little Cayin, I just may go with the Shindo (tubs). I know they're ineffecient, the heat issues, supposedly not the slam of SS but I am so taken back with this little Cayin, I now think I know what the big deal is about with tubes. I'd love to see a state of the art tube rig in my main room. I know I will need new speakers as well but what the heck.