so far the best 12AU7 I’ve tried are the wathen 12AU7-WCL (long plate) they were/are unlisted on their website I tried the standard 12AU7-WC because someone had left a review stating it was similar to the Cifte 12AU7 and after comparing them I’d have to say that they are correct. I had messaged them asking if they had any other 12AU7’s and thats when they informed me they were going to be releasing a long plate version. I loved the standard so much I placed an order for the long plate version and asked them to ship when they came out.