Forgot about the Narda , i need to pick one of those up .
it's a good one. you might also want to check out the Oadis O-atty clone. they have them at focalecig and now fasttech. supposed to be an "improved" Narda. very similar with single coil configuration with airflow going directly to coil. this O-atty supposedly doesn't whistle like the NarDa. i don't have mine yet, but it's on its way.