Yesterday I bought a package of 2 Kingston 16 GB thumbs from Best Buy Can for $14 - about half price - one for the AIR & one for the car. They are 2.0 & work fine in the AIR. These thumbs do not have the fastest write speed, but once it is done, basically that's it. Buffering is adjustable in the APP, but I left mine on the default setting & experienced no stuttering nor pausing.

These are quite small with an aluminum housing that fits the slot of the AIR & allows the 'access door' to be closed with it installed. Thumbs with a bigger form factor may not allow this.

Subs are not required with the way that I use it in the kitchen. The M3s sound just fine for music as is...

TAM