5U4G suitable for Dyanco ST-70?

I'm not a fan of 6L6 or 6N3SE in my modded 70. They just sound fuzzy, even the RCAs. It's probably amp and listening preference specific.

My favorite tubes are the Tesla E34L, JJ E34L blue glass and GL KT77s, in that order.

I'm not fond of my welded plate EH 6CA7 either. The cheap Chinese tubes sound good in my amp if money is a consideration.

Ii also have a preference for vintage 5AR4s, but if they are not available the GL is serviceable, nothing more.

I had an older set of JJ E34L that I liked a lot.

What don't you like about the EH 6CA7?

Sounds a bit hard to me. But sharply focused. I could see some preferring it best. But it lacks the golden glow of my favorite tubes if that makes sense. Perhaps a bit literal for my taste.

The Phillips version of the 5ar4 gz4 is a big built type and fantastic sounding 
several reviews on them they are an inch + taller and look great .
up there with the best ever made around $200 
the cryoedMatched kt66 with this tube and RCA 50s 7199 Black plates are a killer combo ,and you want a great cap set up. Audyn reference caps 
in my opinion better then any Mundorf cap and I have tried them all. In fact I like this cap better then their top Copper cap  and priced decent  
one thing I am doing putting in all Teflon Copper gold sockets noticably bettersonics plus Stabilant-22 on all cleanse tube pins and sockets ,as well as 
everyconnection .a Nasa favorite and last up to 14 years  if not disturbed and temps to 450. Tip of the day. And get a Furutech Copper gold IEC socket 
with filtering built in $65.