Audio note 300b tube upgrade suggestions


Hello all.

Thinking about upgrading the tubes in my Audio Note P4 monoblocks. I need 4 tubes.

I have not heard other tubes other than the JJ’s that are in them. The new Audio Note 4300e's are too expensive. Spending $200 to $300 per tube would be fine.

I have AN E SPE HE speakers.

Thanks
128x128pkvintage
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Any opinions on the black treasure shyuangs?  I am running the Gold Lions in my Cary 300 SEI whcih I am happy with but also wondering what is a step up?
I used the Shuguang black Treasure tubes for a couple of years ( Around 8 years ago) prior to replacing them with a pair of Takatsuki tubes. They were good 300bs and trouble free. The reviewer in the link above preferred the Gold Lions to the Shuguang but that’s just him. Numerous factors determine a choice. It’s very possible that some listeners would choose the Shuguang Black Treasure over the Gold Lions. I'd give them a try.
Charles