Regarding the CSP:
I'm curious to try the Gold Lion 6922 but it probably won't live up to the super$$$ tubes I've tried: Dario Miniwatt E188CC, Mullard 7308, etc.
Currently I've settled on the tried-and-true Mullard E88CC w/old shield logo. No need to use three. Keep the 6N1P's in the driver slots to save cash (the sound is pretty much identical anyway).
For the rectifier I'm using a Brimar 5R4GY which is great, though the RCA 5U4G (black base) is a good & cheap alternative. Also try the Sylvania or RCA 5Y3GT just to see if you like the 5Y3 sound (I didn't care for the Tung-Sol version but it is a popular choice).