I've got the same poor SNR and occasional packet loss problems with some CRC errors. However at least I managed to get a 20mb line :/
As for the fibre interest, there is plenty around the Clareinch exchange. I just doubt anyone is going to rally the neighborhood to do anything about it.
That's pretty lucky, what part of Claremont are you in if I may ask? It seems that whatever I'm connected to is limited to 10meg, according to the Telkom rep.
That's true, if I was planning to live here permanently I would make more of an effort, but since I'm just renting and likely to buy a house elsewhere in a few years, it's not really worth it.