In the end I bought an i5 3570K at 3.8ghz, 8gb Corair Vengeance DDR3 ram, Gigabyte Z77 motherboard and a HD7870 2gb GPU.
Before the servers went offline I could set graphics to maximum except Ambient Occlusion off and get 40 (running through the cities and 60+ fps everywere else. Can't wait for V2.0 now