@1graber2 , If you like the Brimar 12au7, it's worth watching the used market for Brimar CV491. There was a guy on eBay who had a pile of them in the Fall of 2016 and it looks like he's almost out now. I bought multiple matched pairs for good prices.
On the power tube end, there's one tube Kevin Deal doesn't carry and I don't know why: Tung-Sol 7581A.
This is an EL34 variant and I just loooove it. I liken it to halfway between an EL34 and a KT88. I'm not sure if that makes sense, but that's how my mind sees it.
@johnss , I've noticed you've commented on the improvements that can be had by changing out electrolytic caps in the PL products. I've asked for a bit more information and just then you're gone! Can you jump back in and give us more information?