Need Suggestions for NOS 6SL7's

[SLG]

I just pulled the trigger on an Alessandro Beagle. The amp uses 6SL7's in the preamp. This is my first amp using this preamp tube. What brands/manufacturer of NOS 6SL7's would be the best? I remember reading some of these octal preamp tubes were more susceptable to microphonics in guitar amps. Any help would be appreciated.

[Swarty]

Tungsol

[slider313]

I have some JAN Phillips that are very quiet. If you can find brown base RCA's, they have a good track record.