Sorry dude, I think your poll needs removing and then stating as a question. Also you've put that your Seat is 6.0l?
I'm assuming it's the 1.8 that you've listed in your profile. I'd start with the usual bolt-ons of:
Induction (CAIS)
Larger Intercooler
Full exhaust system
Remap
TBF the list goes on and i'm not sure what power your car starts at so it could be an uphill struggle and become quite expensive, entering bigger turbos, water meth injection kits, uprated clutch and plugs, it's never ending so as long as your pockets are deep you'll be fine.