My fave Naim amp (actually, I really liked Supernait 1 also). That Sevenoaks deal is incredible and the great thing about the XS2 is it can be upgraded later with flatcap or hicap.
I ran mine bare for a year and then added a Hicap DR and there was a huge uplift in performance. However, it was wonderful before the added power supply, so you will be amazed if you go for it.