I'm Andrew from Garforth (Leeds) and I've just bought my first ever dub an 06 plate mk5 3 door GTI.....I can't chuffin wait to pick it up. I've been waiting 20 years......ooo the anticipation

Questions is, I bought an 06 65,000 mile GTI so that I would have some cash left over to lavish on her, so where do I start?
I'm currently looking at a Milltek non-resonating cat back or a revo stage 1 tune......any advice would be much appreciated.
Cheers