ADDITIONAL COMMENTS: The main goal of my card upgrade is to run Fallout New Vegas and Crysis 2 at max settings, Fallout New Vegas with much filters enabled (if not all) and Crysis 2 with all DirectX 11 settings enabled (much like "Very High" setting in 1) and no or little filters enabled. Every two years I do a graphics card upgrade and it's now 2.5 years since my last card upgrade.
I've searched a little and found the GTX 270 with bargain 8%, from 497USD (378 Euros) to 458USD (348 Euros): PNY GEFORCE GTX470 1.3GB PCI-E RETAIL
If it's good to wait for new card releases please tell me, I'd like to know.
HD5970, isnt it around the $600 mark? But i think its 12 inches long. It can slide into your HDD drive bays, but you have to check for that. Please mention your PSU brand. If its a low quality one, then you may need to change that.