I am using 1SC FE with Naim XS-2 also. The speaker is still running in (just bought 2 weeks) but the performance in bass, mid-tone and treble is very balanced, much better than my previous Tablette Reference 8 Signature. It can project the soundstage easily and XS-2 can drive it nicely but I think a good stand such as FD2 is a much.
FYI, my system is Naim Xs-2 and CD5X, Hi-lined with Dual TeddyCap. Unitiqute as streaming source of FAS.