If the tonearm cables are hardwired to your Rega, I'd just let it be for now. Whatever they are. the'll be good enough for what you're about to put together.
Later on, you might decide to get an altogether new arm for your TT, new arm and TT, or maybe upgrade the Rega at britaudio as Dan_ed suggests. For now, just get a decent entry model pair of ICs (Bellari to receiver) from one of the above reputable manufacturers and you should be fine.
Later on, you might decide to get an altogether new arm for your TT, new arm and TT, or maybe upgrade the Rega at britaudio as Dan_ed suggests. For now, just get a decent entry model pair of ICs (Bellari to receiver) from one of the above reputable manufacturers and you should be fine.