205/40 is the right tire, but I won't take F1 oder Proxess... IMO F1 is not good enough when it's wet, especially because it's a very expensive tire and the Proxess is very loud. I'm really happy with my Dunlop SP2000 on both of my cars. But this is your decision and depends on the dimension of your tires and your car. But as Oranoco said: don't try to save money with cheap tires...