In reply to J72:
> As someone who lugs a nearly 20kg stage piano plus synth I was interested when I saw the prototype online at trade shows.
I own one of these. It is....what it is.
OP mentions portable and these do tick that box but obviously with limitations.
I don't know how important "portable" really is to the OP but it's interesting that you mention a weight of 20kg.
My Roland FP30 is 13.5 kg and when I bought it I thought "yeah portable" but it's never left my house in 3+ years.
The Alesis Recital (not the Pro, just the standard, with its "semi weighted" keyboard action) weighs in at around 7.5kg and has decent speakers plus MIDI output and is about £180 new. It might be just the ticket for the OP at this stage.