MicroSD speed - Class 4 or 6 ?

[SpookiePower]

I have just bought a Incredible S with a 8Gb MicroSD card. I don't know what class this card is, but movies and music runs just fine.

I now want to upgrade to a 16Gb card - but not sure about if I need a class 4 or class 6 card.

I watch a lot of movies on my IS and record a lot of film, using the camera.
Which class should I pick ?

 

[Usta]

You can test the speed (hence the class) of the card using SD Tools: https://market.android.com/details?id=ales.veluscek.sdtools&feature=search_result

If you get get a class 6 card, the get it.

 

[SpookiePower]

Thanks