Best M8080 NOS tube for CJ preamp line stage?

The origional tubes in my pre were m8080's.The second set which I purchased through cj were cv4058's.These are both mullard's but with different codes.I think the m8080's are their premium grade tube.Cj apparrently bulk purchased nos cv4058 mullard's as my research and trial's have shown this to be the best tube for the classic.Let me know what tube's you are currently using.

I just bought some old records so I'll check under the hood in the morning.

Jeffrey, on the MET-1, how did you determine which tube goes with which channel? Is it something I missed in the manual?
Thanks.

Billimbriale, no, you didn't miss it. I suggested years ago to c-j that they include that info; apparently they're still not.

Looking at the face of the unit, the front row, left to right, is LF, RF, LR, RR. Rear row is C and SW, left-to-right.

You have one? And enjoy its sound? I LOVE mine, and it sounds even better after I replaced the front-L/R channels' coupling caps* with SoniCap Platinums (Teflon-film) and the PS small-bypasses** with Platinums and Jupiter HTs. E-mail me (address in 4th post above) if you'd like pics.

* Originally, large 'propylenes bypassed with small 'styrenes
** Originally small 'styrenes.
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Dre, Here is how the tube reads, top to bottom:

000-458
CV-4058
KQDD/K
80-45