I just got my Dynaco Stereo-70 back from the shop, I have new Svet EL-34's in there and properly biased, but the "7199"s need replacing, they are weak. What would you suggest. I know these are no longer made. My amp guy suggested NOS JAN Phillips if I can find them. These cost twice as much as the Sovteks that are new product. What do you think. This is for home listening, maybe a few Hi-Fi DJ gigs (when I get my Klipsch La Scala's).