Again read my first message - a good deal came up at the time on the japspeed y and decats so I went for them. If I was buying new, Stillen would be my choice and either high flow cats and decats to give it the noise it derserves.
Decats will be a little louder but can cause the o2 sensors error code to light up on the dash. Plus, unless you have a friendly MOT station, you will need to remove them each time.