I'll see if I can get a HD 4870 for a reasonable price. My uncle can get just about anything for a good price. 9 Rand= 1 USD. Sometimes rand gets stronger or weaker. It is Africa unfornutaley.
the HIS
For the same price, it's no contest. The HIS has a far better cooling solution than the stock one. You can directly compare the LOAD and IDLE temperatures here. This would also allow for some overclocking. It's very likely there's a significant noise difference too.