I got 300 with Saab reds. But like nick has linked 440cc I've been advised to get 
With a smaller turbo not high flowing at the topend then the 310cc are fine as the cover the power band nice and scale with the boost to provide enough fuel. The T3 flows higher at the top end with less boost so to be safe the 440cc will flow enough even at static rail pressures.
Nick
When you go hybrid Toby, you will need 440cc for 330-345bhp
