I run the RP-1 with nos Telefunken G73R’s , best 12AU7 made . I have nos RCA’s, Silver Seimens , Mullard , Tungsram and a few others . Rogue pushes the Mullards, but they sound veiled and the Telefunkens are fabulous. I run a Schiit Yiggy and a modded Thorens with a Grado cart . By the time I added the tubes , a good power cord and isolation feet , I’m about $2200. The phono section is fair , but the headphone section sucks . I have Audeeze LCD-2’s and tried my buddy’s Seinheisers . I have Zu omens , so my Had Inspire with all nos tubes pairs well. I’m looking at getting a SS amp with more power to run my JBL’s . Considering a Van Alstine as I’m all single ended and have a boutique theme going, complimented with Morrow cables . But this far down the road I’ve maxed out the Rogues potential and wish I’d purchased the RP-5. I hope this helps , Mike .