I would suggest you stay with what CJ recommends. They have designed the equipment to utilize a specific tube. I have CJ equipment and have tried other tube types and have found that while they all sounded different, none honestly sounded better; just different. All tubes had different sound signitures placing emphasis on different aspects of the music. I ultimately ended up back with the stock tubes. Besides if you are not careful tube rolling can have detremental effects on your equipment. Just enjoy the music!
Chuck
Chuck