SLZB-06. It's Ethernet so you can place it independently of your HA, makes it easier to avoid interference issues. I typically recommend against the 06M, as it is less supported under Zigbee2MQTT. Z2M generally supports more end devices, which tends to be the idea... the platform ZHA vs Z2M is a means to an end, supporting actual useful devices (source: https://www.facebook.com/groups/HomeAssistant/permalink/3684172408520769/)