In reply to Cali4niagirl07:
As others have said, "low stretch kernmantle" ropes meeting standard EN 1891 are perfectly suitable for top-rope climbing in most, if not in all scenarios. Ropes meeting the Type A standard (tested with 100kg) would be preferable to Type B (tested with 80kg) if specifically purchased for this use, but either would be safe.
You are also absolutely correct that they are the best option for minimising both erosion and rope wear on Southern Sandstone.
Providing due consideration is given to selecting a version with good handling characteristics and a compatible belay device, I can think of no good reason why anyone would be against their use.
Post edited at 22:49