[suicideneil]

Brand isnt vital so long as the C rating can be trusted ( ergo, dont buy cheap ebay no-name lipos or maxamps crap )- The Turnigy Nanotech packs are fine, but you really need to use batts with a higher C rating in larger models; lots of overhead is better than 'just enough' in terms of what the battery can output vs what the motor can draw if you load it heavily enough.

The nanos have a good rep for sure though, look at the 35/70c or 45/90c packs..