Okay, I posted this question on another forum but didn't get a lot of feedback. I am looking to replace the microphonic EH 12ay7 in my 5E3. I have all Nos in there except the 12ay7 so I am looking for an affordable replacement. What are your fave NOS replacements for this tube? GE, RCA ,JAN models? Wattya think? Best bang for the buck?