I strongly recommend you try a Canadian Westinghouse VU-71 rectifier. It is a 5U4 rectifier. This is my favorite of all the 5U4, 5U4GB, GZ34, and 5R4GYS tubes I have tried in my ModWright power supplies. There is one on sale for $149 on e-bay now, so you can see what I am talking about. Take a look around and you can probably find one cheaper. I think highly enough of this tube that I bought 5 of them. Three are in use and I'm holding 2 as spares. I have paid anywhere from $99 used to $199 NOS. I suspect this will be more closely aligned with your stated goals. I found it to have less of a bright edginess than the Phillips 5R4GYS, but has a nice sweet extended top end with a very sophisticated layering in the midrange. Brent Jesse has a nice description of these tubes although he has been sold out for years. They are a well kept secret and getting scarce.
I don't have any experience with the 7DJ8 you are using. I am using Telefunken 6922's that I got from Upscale. They are mighty nice tubes, but I can't make a guess how they would compare to your Tungrams. Enjoy your Elyse! Dan does nice work.
I don't have any experience with the 7DJ8 you are using. I am using Telefunken 6922's that I got from Upscale. They are mighty nice tubes, but I can't make a guess how they would compare to your Tungrams. Enjoy your Elyse! Dan does nice work.