A remap or tuning box will bring out the best in the engine
I've done 20,000 miles with the DTUK CRD2+, which is taking the car to 230-240bhp and 500nm torgue. DTUK now sell the CRD3+ which is a similar affair but supposedly smoother, although no complaints from mine.
Also, adding 50ml Millers ecomax to every tank makes the car run smoother.
A lot of folk recommend a DTUK pedalbox too, as it improves the feel of the car.
How are you finding the Milltek exhaust? Sound good? Let us know if you fit an induction kit, although I'm not sure it will give any improvement without a remap?