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
Sophia Electric has the Full Music 845 MkIII available at up to twice the price of the Psvane 845T (845T is sold out until Dec.,btw.)

Will they sound twice as good?

Your getting in to NOS prices now. Might as well try for some RCA's,imo.

http://www.sophiaelectric.com/
Wow, $900 for a chinese current production 845! NOS 845 are looking like a bargain.
Thought I would report back again. My amps have hardly been turned off for the past 12 days as I continue to burn these valves in at maximum effort! They now have nearly 150 hours on them and they are massively improved and are still improving. It seems as if every day I listen to them, the soundstage gets wider, and the bottom end opens up even more. The top end is already better than my old valves.

About the one thing I do not like with these valves is a bloominess in the midrange which was absent in my previous valves. Having said that, the bloominess is not that prominent and some people might actually like it.
UPDATE ON TJ 845.. WARNING !! DO NOT TRY THEM... my matched Quads did not work...
I will now have to stick with the PSVANE 845.
I don't think the TJs are same spec as RCA anymore.
I have the audion elite 3 box and have the 845b, shuguang 845m and just recently the kr845. Overall in the context of the rest of my system the kr845's are the winner. I prefer the b over the m too because i find it more "beautiful" in the midrange, though its not as robust as the 845m, i like its more "liquid" a presentation. The kr845 has a wonderful sense of "flow" that is very appealing and seems to my mind get alot of the parameters of music "right". It is not perfect but like i already said, it has the most plus's with the least amount of - tives. I found the kr's presentation a more palpable one then the others too. I would say the kr845 is easily in another league than the other two. To me it is a finely bred racehorse while the others by comparison are just "good".