Thanks for your quick reply and for your support to RADDS users (thumbs up!). At the end I'd probably upgrade to the whole Duet package.

I'd like to buy a 5" PanelDue for use with RADSS/DUE combo but I'm not sure of the actual status of compatibility and support (present and future).
RepRapFirmware (1.19.2) is working great in my delta setup. The setup and tunning process has been a little bit difficult but at the end was worth it.
In the future I'm planing to move to a Due Ethernet controller but the first step could be to add a PanelDue and make upgrades form there (IR sensor, effector, controller, …).

Could someone confirm if PanelDue will work 'out of the box' with the RADDS/Due?
Is there any limitation (SD card speed, interface, ...)?
Is there (and will be) any official support for RepRapFirmware for RADDS/Due + PanelDue?

Thanks in advance,
Javier.