Its my pleasure mate. I would love to hear how you find the SX2’s change with SN 2 if you feel like sharing.
One point is speaker cables. Assuming you got Naim speaker cable when you started with Naim this will not apply, but if not it might be a good idea to sort them out next.
Refer here Speaker Cable for Naim power amplifiers
After that if you still have the bug and cant resist spending $$ you could consider racks, power cable, interconnects, streaming memberships like Tidal if you don’t have one, CISCO switch, Ethernet cables, power supplies, dedicated power points…should I keep going? 