New GFX sujestions

So, Iv been having afew issues with my current gpu and its basically on its breath. So Im looking into getting something new, preferably within the AU$300 mark, although, if the current one can last just 2-3 weeks more I could possibly get AU$400 but thats getting abit pricey for me. Iv been looking into something in the HD6xxx range and Id like too have a decent performance improvment from my 4870. If anyone have an sujestions on which one would be best, and possibly which manufactures too go with. Iv saw a HD6950 for AU$290, but its from a manufacturer called VTX3D which Iv never heard of untill now. Anyone know if thier any good? And is the 6950's any good?

Im starting to think maybe I should go with the 6950 from vtx, they seem quite decent, and the cards apparently good for OCing to a 6970. So How does this looks for the 290 price mark?