Best 845 tube out there?


I am running a pair of Cary CAD-211AE monoblocks with the standard no-name Chinese tubes shipped by Cary. Whilst I am happy with the sound, I think I should buy a pair of 845's to keep as backup in case something happens to these tubes.

Because I will need to buy FOUR of them, this rules out any tube that sells for stupid money (e.g. vintage RCA 845 tubes).

The only current production 845's I am aware of are:

- Shuguang 845 "standard"
- Shuguang 845B
- Shuguang 845C
- Shuguang PSVANE 845
- KR Audio 845

I have found reviews of the Shuguang 845B and 845C, but there is virtually no information out there on the new Shuguang "psvane" 845. Has anybody heard this valve, and is it a noticable improvement over the 845B and C? Also, what do people think of the KR?
amfibius
According to Psvane Audio, Psvane WE211 tube can replace all current 211 tubes in high end audio application, BUT I have never seen any published specifications to confirm this claim.
I hear one drawback of Psvane 845T MkII though. The imiges are slightly less "dense", slightly less palpable when compared to 845B. I wonder what WE845 is like? I've read it has even more detail, more "air" but.. does it trade some image density, palpability for airiness? Where would you place it?
There's been a drastic change since thread was started in 2010. A new tube by Psvane is about to take over the 845 world without mercy like Genghis Khan and his Mongols did.

This new tube is the WE845! It's voiced to sound like the Western Electric 284A but it's built to the specs of the RCA 845 so that it can be dropped in as a direct replacement for any 845 tube in any amp that uses regular 845 tubes.

I've been using a quad of these in my Mastersound Reference 845 for about 1.5 months now and I'm just about to start my critical listening, with a review to follow very soon. I don't want to say much as I've only listened for fun up to now as the WE845 tubes "break-in".

However "if" you can read between the lines, read this: In my Mastersound I've used regular Sino 845, 845B and even a quad of RCA 845 for a week before selling them. But this past 1.5 months is the most fun I've ever had listening to my Mastersound in the 11 years I've owned this amp!

But as I said before, I've only listened for "fun" non-critically as the tubes break-in. I haven't listened critically yet...
Tcscata I'm glad you like the WE845 tubes. They are so clear and quiet its startling. They make your system sound their best. If your system is towards the lean side it won't hide it. The original RCA tubes are much more colored and remind me of the old Marantz tube sound of the 60's, warm and beautiful mids, but slightly rolled in the top and bottom.