My C2Q at stock, 2.4GHz, is too slow, but OC'd to 3.2GHz it runs fine.
It's a weird time to buy a CPU because AMD has fallen behind, new arch not out yet until 2016. TONS of powerful used chips for cheap available.
What excites me about the game is the roadmap - it's improving and will do so for a long time, many games these days are published then forgotten, glad this is Brad's pet project, just have to make sure Paul keeps him in order for all those years