In general depends on: room size, how loud you listen, and input sensitivity of the Naim versus output of your source.
The Naim is rated at 60 wpc into 8 ohms, plenty for most applications. Realize that 60 watts translates to 17 dB of gain, so with the Argons you should reach 106 dB at one meter, which is quite loud (86+17+3 for two channels/speakers). The rated input sensitivity is quite low, so not a limiting factor.