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.