My faithful 8800GT seems to be dying. It has been making a buzzing noise for a while now, which isn't fan related so I'm assuming is a dodgy capacitor. Now, while playing Oblivion, I'm getting artifacts followed by complete system lockups, requiring hard restart. I'm likely to be upgrading my MB/RAM/CPU/GPU in about 6 months time. What I may have to do however is replace the GPU now with something of around the same level to allow me to play some games on the PC. So my question is what current GPU can I buy of around the same DX9-power as the 8800GT? A quick cross-check of videocardbenchmark.net and scan.co.uk finds an AMD 5670 at around £65 - does this sound sensible?