I believe the down draft craze had subsided somewhat..The benefits are at lower temperatures and can cause problems when cooking at higher temps unless the device can be opened up to allow for better air flow..From what I have seen, the problems outweigh
the gains..The DLX should have a more even airflow around the cooking grate due to its centrally located chimney resulting in a more even cook and smoke distribution... What is driving you towards a down draft?