which 6sn7 gives the most air??

Here's a link to Brent Jesse's 6sn7 website page - might be helpful to you. I am not affiliated with Brent other than as a customer

bopper,
Go to head-fi.org and read The Reference 6sn7 Thread. They list all the 6sn7 tubes and pretty accurately describe how they sound.

I have collected just about all the best 6sn7 over the years.
Top end air, Tung-sol round plates or Sylvania 6sn7w tubes.
The Ken-rad VT-231 staggered plates have great bass and have more of an airy midrange than treble.

The Sylvania 52'GT(bad boys) are beautiful sounding tubes and probably my favorites. I know everybody loves the Tung-sol, but IMS the bad boys just sound perfect.

The Brimar CV1988 6sn7GTY are really nice too.

  

thks will look at those- what are the pope tubes- Saw a quad set for sale and seems like a great tube but big bucks - what makes them so special-  

My vote is for a pr. of red base NOS 5692's.  

Read what Brent Jesse says about the GE short bottle side getter. Also, there’s comments like this on other websites about this tube. Appears to be champagne taste on a beer budget. Have a friend that tried a pair and they stopped him rolling tubes.