At one time, I owned the MW 5400ES and cycled thru all of the tubes you reference. All are good, none necessarily better than another... just like different flavors of ice cream. If I recall correctly, I think my go-to tube was a 1940's vintage smoked glass RCA VT 231 purchased from Brent Jessee Audio Supply.
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No, although there are other old stock tubes you may want to try. I find the Sylvania VT231s to be bit bass shy and the Ken Rads to be a bit treble shy. If you have the funds, the Tung Sol black glass round plates would be great. If not, I think the sylvania 6SN7Ws may be the best of what you have listed.
I suggest, even urge, you to invest in a pair of Black
Treasure CV 181. I've used them in amps, i my current
preamp and IMO they beat my stable of some of the "best
of the best" old stock 6SN7.
I buy mine straight from China for less than $130 per
matched pair. No need to pay more.
Here is a corrected version of the link that was posted by Doak:
08-24-15: DoakYep, This mirrors my experience rolling BT CV181 in a MW Transporter years ago.
I have several friends rolling them in their VAC 450 and Phi200 mono amps.
Oops! Pardon the link blooper.
Shouldn't take nearly 500 hrs to tell the tale.
BTW: I am also using the Shuguang Treasure 6CA7-Z power
tubes in my Quicksilver amps. These bested one dozen sets
of NOS and new production tubes I've search through and used
over a number of years.
Like the CV181 the sound is solid, detailed, clean and clear
while maintaining very fine musicality. Honestly, except
for the 12AU7 in my system, I am off of old stock tubes.
Honestly, that is quite a relief.