So I’ll start off by saying I had a 1969 MGC GT back in the mid eighties, if you know what that is :-) My close friend owned a TR6 at the same time. I loved those cars.
As far as this all in one Naim Unity Star 70watts per channel my not be enough steam to drive those speakers in a 20x24 room. The simple one box solution is enticing, not having to invest much in cables is nice, but your really limited to how this Naim sounds and the power it produces. I like options and if it were me, I would invest in some separates like a fine powerful (200watt+) integrated amp and a high quality DAC and last but not (if were talking digital) least a Aurender music streamer/server.
Matt M