Link is gubbed.
If you want a 6670, I would recommend splurging on the extra tenner and buying the GDDR5 version. 'Tis 20% better than the DDR3 version.
I found my CoolerMaster GX 450W Bronze 80+ for £25 at novatech, don't sell it anymore, though. If you can find one on the cheap, you could nab one. They don't get (At least, this one doesn't) hot in the slightest.