Getting ready to start an 18W build in a couple weeks, I've built a couple 5E3's and 6G15's. So the amp is a VHT 18watt looking forward to building a more challenging build than my 5E3's. The amp has two EL84's never having an amp with with EL84's looking for advice on what a decent Tube brand is. I'm not looking for vintage mojo just a decent new production tube. So what a good new production EL84 ?