I have a feeling that the likely response is going to be “no”.
If possible, see if your friendly dealer will loan you a pair to try in situ in your room.
You have not listed your source(s) as far as I can see, but I think using ÂŁ12k 'speakers with your amplifier combination is a potential mismatch, irrespective of your room size.
“Sopra N°2 is easy to integrate with most systems thanks to its remarkable bass control. Perfectly at ease in rooms under 30m2 (325sq-ft), its design is ideal for larger spaces, filling rooms up to 70m2 (750sq-ft). The attention to amplifier quality and to precise room positioning is the key in resolving their deep soundstage.”
Sopra 2s may well work just fine, but the dimensions of the room may have the greatest impact; for example, a square room can create all sorts of issues for loudspeakers (a perfect cube, worst of all), whereas a room that’s more rectangular may sound great regardless of size.
For all that, it’s a lot of speaker to be running off such a system. I take it you’ve listened to them in context of what you have?
It might be worth saying what your source for the nDAC is, what your current speakers are and and what made you focus on the Sopra 2.
If your room is about 3m by 4m, the Sopra 2 is very large and will be very dominant, especially as they need space behind them. It might be worth getting some cardboard boxes of the same size and placing them with about 60cm behind them, to get a feel for how it might look.
I can’t help thinking that if you want to spend £12,000 a 282/250 and some much smaller speakers might be a whole lot more liveable with.
I’ d not discard these for room size alone. In particular what is your room size, only a square shape could be a no no.
For the record, my S600s lwork pretty successfully in a 16 m2 room. On the other hand i have nSat in another 35+ m2 room working very brilliantly with 202/200DR
I had the 200 with 1028be, when I replaced the 200/272 with the 250.2/272 I found a great improvement everywhere, bass, medium and treble… for the Sopra 2 I advise you at least the 250 if not the 300 otherwise you will not enjoy it as it should.