Magma and Veritas are great devices, and I'd also throw in a vote for the Plume veil. The dual hole positive post makes it really easy to build single coils of any length or style, and the top cap has options for single and dual airflow.
The Stillare, Mephisto and Zenith v2 should also be on your list. They are all small capacity atomizers that provide warm, dense vapour in single coil mode.
The Stillare, Mephisto and Zenith v2 should also be on your list. They are all small capacity atomizers that provide warm, dense vapour in single coil mode.