Tube Rolling

Just remember the 2 innermost on both are what will have most impact.

Go to the Upscaleaudio.com site

 Plenty of PL user reviews on most popular tubes. I remember when those  were 1/4 the  current price!

The KT88'S should sound like... KT88's! Hopefully you'll prefer them over the EL34.

8 of them is a  pricey experiment.

I rolled the tubes in my PrimaLuna Integrated. Biggest impact was moving to KT-150’s.  I believe took the sound to the next level.  Also moved to NOS 4003’s and no way as an improvement as the 150’s.  I would start there.  

I used those tubes from Upscale in my Rogue ST-100, I really liked them and would swap with some Telefunken's, they both gave a nice contrast and kept things interesting. I thought the Brimars had a really nice tone and the telefunkens were a little more dynamic. On the Rogue, I believe these tube were the phase inverters, Rogue told me the phase inverter tubes had the biggest impact on the sound in their amp. For what that's worth.

You might also want to reach out to Brent Jesse.  He is more than happy to share his experience and opinion on which tubes to use in what equipment to achieve the sound / change you are  pursuing.  

In terms of sound and texture.  Since I also have a PL Dialogue Premium.  What combo of Gain (center two) tubes and power tube combo would give you a taste of 300b goodness?