There's this
JVC which looks to be very decent at the price- even plays FLAC files, and has Android music playback.
Then there are these
Pioneer splits- rated at 60wrms- not the 100w of the ones in the op, but still plenty more than the head unit can supply without an amp. Also has a decent frequency response 32-43,000 Hz - which I admit might even sound bit too good to be true for a 6" system.
Should put at round about R2k- as per your budget.
Of course there are plenty other options- and they may even be better even at the same price- I'm not an expert by any stretch of the imagination (I also kept to takealot-sourced items as that was what you linked to in the op).