6SN7 tube question


Hello,

I need to replace the tubes in my Rogue 99 line preamp, which uses the 6SN7 tube. I was looking at an online seller who offers the following options with an affordably priced 6SN7 for a few dollars extra:

1. Balanced Triodes
2. High Gain
3. Low Noise and Microphonics
4. Matching

Options 3 and 4 seem most desirable for a preamp. My question is whether it is worth the extra few dollars (approx. $6 per tube) or is it just a pure marketing ploy to get suckers like me to drop more dough?
actusreus
Why would you want a tube with Microphonics? My friend has a Rogue preamp and loves the Sylvania-Baldwin 6SN7 tubes.
No way to know in advance if it's worth it. If you got a noisy or microphonic tube and had to return it you'd be out the $6 anyways. I'd definitely go for tubes culled for noise and microphonics. Matched pairs maybe not so much but then again I'm not an imaging freak.
Definitely low noise, low microphonics. Matched tubes not so important in a preamp, except for the possibility that the 2 tubes being tested and having close specs may result in a similar life expectancy.
I third Andy and know for sure you are in good hands and will get the best/right tubes for the application.