Dude's 6SN7 replacements with Chinese CV-181/6SN7

I've been using CV-181 Black Treasures in my Dude for about 3 weeks now. I agree they need some burn-in time before they open-up and "bloom". I'd say mine need some more playing time but even at this stage they are an excellent choice. Very extended on both ends of the spectrum yet natural sounding.

A top amp manufacturer loves the Brimar but where can I get some ? Ultra-rare, they seem.

My Dude is about a month running in my system now...theres a really lot

to like but tube rolling will be soon... Im assuming the 6sn7s are all i should be looking for...the others just keep in as per Paul
? Thanks

I like RCA tubes from the 40's. The other 6sn7's I like are the black base Marconi's.

The Dude is really amazing sounding and takes about 200-300 hours to fully open up and settle into the sweet music it is capable of. Congrats on your Dude purchase!

Well, I did my "default move" which is to call Andy at Vintage Tube Services again...he had helped me equip my trusty Sonic Frontiers Line 3 Custom Edition with some great sounding tubes so I figured I'd trust him again. I too have RCA 6sn7's coming from him now (they should be here in a day or two) as well as the other 2 too...(6080 and OD3)...they're all vintage NOS late 50's-early 60's which he assured me should sound fantastic and he's matching all 5 6sn7's so anyone can go anywhere (I too have the 2 per channel plus the pwr supply section for a total of 5). I also have the heavy duty transformer and all the accompanying "heavy duty" upgrades...). It IS coooool... What a beauty AND beast wrapped into one unit!
I let it stay ON for almost 30 days straight so it has its 500+ hrs on it but since then I've been turning it off when not in use then powering up when I want to have a dedicated listening session...this normally entails a half hour warm-up period for my [tube] amps anyway so it's easy and no problem. Paul said it will sound fine this way...
I told Andy I wanted rich but detailed sound...no glossy cover-ups, just natural, organic...wide & deep staging...(yes, we all want it all) and he said these RCA's were the ticket. I'll put a few hundred hours on them and hear what's what...
Thanks for the advice Bill and all...
I am curious about those Marconis though...I wonder if a pair swapped with/into the RCA's could be a satisfying combination?